how much does it cost to host something like that at a data center?
ALOT, but i believe he owns the place so

I don't own it, but I have good connections :-) PM me if you're looking for DC space, and I can introduce you to my connections :-D
I did PM you about the cost of DC and help finding a DC in NJ, would appreciate if you could tell us how much it cost you to rent the DC, doesn't have to be exact, range would be great and the power cost also. I have 6 S1's but looking to get lot more machines in the near future and invest substantial amount of funds to do this and would appreciate your input, We have a commercial building that we own and the basement is about 1000 sq ft and I am thinking about converting it into a DC but just wondering if it's cheaper to rent before I spend lot of money adding additional power, cooling, racks etc.
thank you
if you have the space i would run your gear there. Install a few L6-30 circuits (220V, 30A) with server PDUs so that everything is a bit more efficient on a higher voltage.
throw in some shelving units ($50-75 will get you a nice steel rack with wooden shelves that can handle >2000lbs) and make sure there is sufficient airflow/AC capacity.
unless you know the DC owner, you would be looking at about $300-$500 per rack/month not counting in the costs of power and cooling (which would be about the same as cooling and powering yourself).
also gives you a bit more freedom to use more space and not have to jam things tightly into racks