Find an electrician on craigslist.
I called one back in 2011 and had him run 70 amps off the main line to my garage. I ran 35 Video cards + about 15 box fans through 2 summers. After 2 years I finally melted the wires and had to have them replaced with larger wires.
I finally moved everything to my warehouse that has 2000 amp service because I am sucking down way too much power now for my house.
I just had 2 more 200amp panels installed.
How much did it cost to add each 200amp panel (I'm assuming single phase 120v)?