Steam cards: Craft VS Sell [The noob got his answer, thanks!]

Donate your cards to the homeless people

I also don't want to invest a ton of time into it as I do value my time

This is the key part. Unless you're very young, there's little point investing time into what is essentially a gamble.

Craft them and sell the seasonal card. when rise a little more the price.

The booster pack drops are so low that it's not worth it to level up just for that chance. I'd simply sell your cards though if you have no interest in levelling up. This is the time to level up though... I crafted 128 badges, gained 30 levels, and still sold my rewards for more than $25.

Valve used to do big sale promotions where you could win really valuable items by crafting cards. Sadly, they stopped doing so, too much effort giving users fun things apparently :(

My advice is, if you get nothing for crafting this sale, just flip a coin and what it says.

You can find traders on SteamTrades that will trade you games for cards.... ;) Just sayin' :)

If you don't care about level, and wan't to have some more money to spend on new games, and don't have much time to do all sales.. Sell all the cards.
Either sell them in bulk to someone who wishes to purchase that many, or retail them on steam market. For that you can get tools like Steam inventory helper, where you could select all the cards (manually) and then put them all on market it one shot (it could also automatically adjust to current market price with adjustment you select)
One more thing - if you decide to sell them on steam market, for that quantity steam will ask of SSN/other ID verification.

don't craft, don't sell...
at least until the cards are officially released

You might want to craft a few badges just to raise your level a bit. In case you want to trade with someone, usually people are suspicious of zero or low level accounts in case they are scammers.

Alliance Scum already on steam... you should just loose your cards (just sell and buy new games).

Boosters are only semi-profitable in 2+ year range and if you can get yourself to at least level 100 in a reasonable price.
Otherwise get level 10 only to receive free season sale cards from voting, and either trade or sell them. Trading is more profitable, but also more time-consuming – especially if you don't want CS:GO, TF2, or Dota 2 stuff but actually meaningful things.
(Oh, you don't have to craft 10 badges for level 10. Being on Steam gets you instantly to level 1, 100 games to level 2, and the community badge to level 4 at least. So you can save up more cards to sell.)

Thank you all for your help, I think it's fairly clear that given my desire to not spend a ton of time on this it would be most advantageous to just sell the cards en masse via SIH. I consider my question answered very well and am closing the thread.