Like this title says..

I currently have a 12 1080 ti rig running from an 12 gauge extension cord (2 1200w bitmain psu to power 12 gpu's and a 1050w psu to power mb and risers.  The extension wire do get a little warm.  I also have another 6 1080 rig which i put it upstair (afraid ill trip my 20 amp fuse). My real question is....how do you manage to run multiple rigs without re-doing all your house wires?