PC build question :)

AMD? JA!

Case: Thermaltake Versa H21
GPU: MSI GeForce GTX1050TI 4G OC (I prefer ASUS always but It is more expensive)
Mobo: Asus B150M-A
RAM: Kingston HyperX Savage DDR4 2133 PC4-17000 16GB 2x8GB CL13 (Bought at ~80 € on the last year)

You don't need such a strong processor.
8 cores on 4.0GHz? Why - is he gonna do some serious rendering?

Here's my recommendation, less money on the CPU, more money on the GPU.
Don't forget the OS

The AMD FX line is incredibly outdated, but their new Zen chips seem to never actually hit the market. If you can wait 2-3 months, they may see the light of day, so it would be much better to get one of those.
Otherwise, an Intel Pentium is a decent option, or a Core i3 for more money.

The cooler is nice, but the Cryorig H7 is a bit nicer. Not enough difference to warrant a switch, so it is more like an observation.

An RX 470/480 is a much better choice than a GTX 1050. You can get 8 GB of VRAM and an architecture made for Vulkan/DirectX12 calculations for much longer expected life span. (The current NVidia cards are still essentially the same old DirectX11-suited chips on a crack. They are better for current games though, meaning a better option if you don't expect to use it for more than 2 years tops.)

8 GB RAM is getting a bare minimum, so make sure that it will be among the first to be expanded.

Case is a tad expensive for a budget build.

PSU ditto. You could try to get a cheap Corsair modular one; that rig wouldn't require more than a Tier 2 450 Watt PSU at best.

Try to squeeze in an SSD. If nothing more, than a cheap 120 GB AData one. Even the shittiest SSD can make the operating system run five times as fast as the best HDD.

Dump that CPU, wayyyy overkill and get a much better GPU with the money.

Intel Pentium G4560 (<- dat price dat power )
or
Intel Core i5-7500 nothing else... otherwise wait for zen

dream on with 159 euro for RX...cut the case, cooler and get box i5-7500

I wouldn't recommend a cooler by Arctic.
I've had two and was unsatisfied with the cooling capabilities.
I don't want my CPU temp to be levelled at anything above 40°C.
I like my (kinda) new Scythe.

Actually, the GPU will render a lot while running autocad, solidworks, or other 3d modeling software. They don't just work for games.

You can do better with 700€ much better.

Remember SSD is a luxury. And if it's for school and not gaming, an skylake i3 should do the job. Those AMDs CPUs are really old, past gen. AMD needs to drop his zen or whatever they are named (I always forget the new name). Their old CPUs are no longer in the fight.

Cases are very personal and I won't try to convince your friend. Sharkoon has made some good ones but also some shitty ones. Their plastic cases look like mid tier and you pay mid tier but they are low tier. Be careful with sharkoon cases, he needs to look more than one review about it.

Could go for a Hyper 212 to trim down a bit but it won't really be by much. Ten bucks tops.

by no means even consider the AMD FX line up, not only they are old they were extremely inefficient and noncompetitive at launch and things haven't got any better since then.

get an i3 with HT, it might not beat the i5s but it will beat those FX easily, or a 4000 series i5 they might be chaper and the perfomance difference is not as big as with the FXs.

All I'll say is try to squeeze in an SSD. It really makes a difference.

Did you check the Best Buy Guide January on Tweakers?
I always use that site when I do an upgrade

at this point unless it's mission critical I'd say wait a month or two for new products to drop, even if you don't like new products it'll force down prices on previous hardware. I see your friend is doing AutoCAD and in that case two things to note are that the 8350 doesn't have 8 floating point processing cores it has 6 even though there are 8 threads, this will impact your times, the other is that while APU's (A10's specifically) are technically 4 processing cores/threads they have an additional 12 "graphics" cores that could aid in this exact scenario.

on price to performance I generally recommend AMD for GPU's unless your friend knows he'll be using CUDA optimized programs and in the case of autodesk software it should be optimized for both though you might be better off with a slightly older "workstation" GPU like FirePro line or Quadro's. The additional certifications on workstation cards benefits their use in professional programs, and they can game on par with their counterparts in the non workstation category. Though obviously from your w7000 post that might not interest you especially considering relative cost but had to put it out there.

Unless your friend needs 1tb for sure I'd say get an SSD of some kind, noting that AMD doesn't support NVME booting as of yet till the next line comes out. You can always add a large capacity drive down the road but in my experience 250 to 500 for OS and basic programs is enough, for gaming you can anticipate 1tb per 175 to 200 games on average so unless he's got a substantial library he'll have time to save up for an extra drive and in the mean time the SSD will be a life changer.

On a personal note I might try to recommend a barebones kit like ASRock M8, should fit close enough to budget to work with and has the aesthetic appeal your friend wants ( I think) either way many kits have great deals for price combinations. You might also try pcpartpicker for future list building to make things easier on people's opinions.

go with an intel cpu and nvidia graphic card

2nd for sure, AM3 is incredibly outdated, has no upgrade path and has really low IPC. (read as is trash)

As for the cooler, get Cryorig H7 or 212 Evo.

1050Ti is not a powerful card at all, even G4560 will feed it, an i5 is a waste of money for the 1050Ti.

I'm running an i3-6100 paired with a GTX 970, which is 70% more powerful and it runs pretty balanced.

It is not a good time to buy a new PC, me and my friends , we all want to buy a new PC, but we are waiting for the new AMD CPUs, and the AM4 platform which is going to stay for at least 3 years so upgrade would be possible. The AMD choice should be cheaper, both the CPU and motherboard, the extra money I can put it in the video card or other components. But if you have to buy it now then you have to buy it now...