What would be the right investment to make a return on mining with a budget of $5k to $7k, not to make a living off but just to make a reasonable little profit? Ordo you have to spend much more? what equipment would you buy etc???
Example: 2nd hand hardware
rig1:hardware
mobo+cpu 110,-
psu1200 watts 120,-
mem 4g + usb 20,-
hd5870 80,-pcs x 5 400,- total 2gh
total invest 650,-
2gh for 650,- is possible if you take your time to search good and make 10rigs out of it
6500,- / 650,- = 10 x 2gh = 20gh 6k/7k invest (without elect cost) you are a big miner then...
making almost 3btc a day is now 3x 19,50 = 58,5 aday x 30 is 1755,- a month ROI in 6 or 7 months IF
This is just a very tight example and you must count some more
things like blowers and airco unit, lots of cabels and pcieriser gear and electr. costs your own time setting en keeping it running.. but it is possible..if the btc price goes up you will have the number almost right here ...but donn,t understimate the work of keeping 20gh running let alone the electr. bill you will get ...and IF asic arrive you better sell everything very fast to buy 6/7k of asics
But if you want to make a living you better start a own pool and make sure everybody mines with you..
GL