I've noticed you haven't addressed this yet.... It would be a shame if you bought wiring supplies & got everything hooked up only to find it won't do what you want it to do... I'd suggest getting the compressor close to the power panel and the RPC... Hook everything up and test it before doing a lot of work... BTW I started with a 10 HP RPC for my 7.5 HP lathe... It didn't work & I had to do it over... We all find deals & hope for the best... But throwing money & time at setting this thing up is gonna be a bummer if it doesn't work...
