So, here is my proposed first build. Can someone correct me if my math is wrong, or I have a complete misunderstanding of mining?
6x @ $159.99 = 959.94 - 10% discount = 863.95 http://www.amazon.com/gp/product/B00IDG3IDO
1x @ $129.99 - 10% = $116.99 http://www.amazon.com/gp/product/B008G9MX48
1x @ $49.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16819116974
1x @ $40.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16820104238
1x @ 69.99 + 6.98 shipping = $76.97 http://www.newegg.com/Product/Product.aspx?Item=N82E16813157471
= 1237.9 total
stating they are getting 250kH/s at 28W and 300kH/s at 34W
Rounding up and estimating here, I can pull in 1800 kH/s at 240W add in the cpu/mobo usage, nowhere near or over 100w. Here my rate is .07 for 0-800kwh and .08 for 800-1500kwh and .09 for 1500+kwh. Currently I use ~800kwh so I can plan for the .08 tier of power for my rig.
At 350W of usage, I suspect I would see 250kwh usage in a months time. at .08 usage rate, My estimated monthly running cost would be $20/mo per 1800kh/s.
Using calculators, I see I can estimate running solo to gain me 14-15ltc per month. Which is somewhere around $250/mo. subtracting usage of power I am at $230 profit per month. This would leave me at about $7.60 net gains per day.
To pay off my initial cost of $1237.90 (provided litecoin difficulty and value does not change) I would have to mine for an estimated 163 days. or 5.5 months. Being I can probably quickly and easily sell my components at 50% cost. I can break even after 2.5 months of mining.
Everything thereafter would be 100% profit in my eyes. Please let me know if you see any flaws in my math.
EDIT: I was hoping to run under a linux/debian build, seems like a different OS may be better suited for mining with nvidia cards. Can someone give some input on this? THis thread is simply too long to skim through for my answers.