I have no issue with electricity, its free for two years from now. I want to buy a hardware which I could bear in my living room, because i have only one room :-) . So I found Antminer S3. I am going to order a used S3 on amazon. I don't know which type of PSU should I order for one S3. Another thing I would like to mention, 4 hours a day we stay out of electricity due to some short falls. And i need dedicated computer for S3?
The S3 is a self contained unit, it only need to be connected to the router somehow to access the internet. You will only need a networked device to access and change its config. You should get a S3 for 100$USD big max and maybe something like an EVGA bronze to run it, if you're trying to go with the cheapest setup. Beware the noise. The S3 is very very quiet compared to most miners now, but less noisy is still noise.