I saw your post about needing an electrician in Colorado Springs. I am in Denver and looking for a qualified electrician. I'm running an 8-3 wire from main panel to sub panel about 80ft. Currently a 12g wire is there. Access point is in crawl space under house and may need some assistance in properly wiring the 8-3 wire. Is this something you have more knowledge on?
It sounds like you have a handle on what you are getting into. Are you pulling through conduit? If so, how big and are there other conductors in the conduit?