As far as the power setup goes, my dad has a huge workshop that has 3 phase electric, it uses to be for heavy plant machinery.. its just going to waste now...
I think the best thing for me to do is contact an accountant?
Okay, I don't know how your breaker board is set up, but usually, when you have something like this for heavy machinery, you're going to have one big jumper at 25A or more for the machinery itself and maybe a few 10-13A breakers for the lights and a few sockets. The problem with this is, that if you put all your miners on that one jumper, if it breaks, all your rigs go offline until you manually reset the jumper.
You need to plan your electrical setup better depending on your hardware and how much cards you put on one rig. For instance:
1x 6 card rig will pull around 900W dual mining ETH/SIA
1x 8 card rig will pull around 1150W dual mining
(this is with undervolted cards and assuming you're on 220V). So:
1x 6 card rig will pull 900W/220V = 4A
1x 8 card rig will pull 1150/220 = 5.2A
If you have only 13A breakers for the sockets, that means you can put a max of 3x 6 card rigs or only 2x 8 card rigs. Anything above that and the jumper will break.
Ideally, and this is just what I did at home to be safe, you could/should install 16A jumpers to have more leg room. Each socket should be connected to one of those jumpers with at least 2.5mm2 gauge electrical wires . The wire gauge is very important here if you don't want things to catch fire, the temperature can get the plastic in the wires to melt until they come in conctact. Too many people put many rigs on classic residential sockets where the wiring isn't made to support a high amperage for long periods of time.
I would say, before getting an accountant, get yourself an electrician that can look over the setup.
