I started bitcoin mining back in June of 2013 and quickly gave up on it since the Asic have flooded the market and make it unprofitable even if you are going professional. I just got back into mining once I started reading up on Litecoin and other scrypt based currency.
So I don't have the money to invest into a $3000 rig, but I do have some pair motherboards with PCI-X slots. I took all the different Video cards from the "
https://litecoin.info/Mining_hardware_comparison" website and then went to newegg to get a rough pricing. I then took the expected KH/S and divided it by the cost of the card. It turns out that for a quick return on investment, (remember, I only needed the video card). The best card in January 2014 was the R9-270. It has the highest ratio of KH/$. I have been mining for just about 3 weeks and have cleared over $100 mining Doge coins (scrypt based like litecoins).
I have been using the site multipool.us, they have 19 different Scrypt currency. I have also used coinex.pw, they have even more. You can either mining one coin only or have the system switch between the different currency as the profitability of each change (min by min). I found out that 93% of the time, Doge coins where the most profitable so I mine just one.
If you don't want to buy things in Doge coins or Litecoin, you can use the following site to exchange them for Bitcoins. (
https://www.cryptsy.com/users/register?refid=133211). I used my referral address since I get a little bonus if I refer people to there site.
If you don't want to even buy with bitcoins, you can also use another site to actually cash out the bitcoins into cash and have the money deposited directly into your checking account. (
https://coinbase.com/) again, I use the referral address so I get credit for recommending them. You can also buy bitcoins directly from them so if you can get into bitcoins with out having to mine.
I hope this helps you make good decisions about mining. It can be a good source of extra money. My goals with mining is to pay off the card that I bought and keep paying on the credit cards until I am out of debt (or at least pay off that one card).