I just use my 15A service. I don't plan to live in the TT while at home and thus won't need the AC, but I've run my TV, Fridge and Lights off the 15A no problem.
When we get ready for trips, we fire up the fridge to get it cold before hitting the road.
Mind you I do realize you have a Much larger rig to power up.
Wayne, Kim, Mallory & Abby the Dog
2013 - Jayco Jayfeather - X20E
2012 - Toyota Tacoma DBLCB Sr5 with towing package
Equalizer 10k WD, Prodigy P3 Controller, TST TPMS
2012 - Jayco Sport 10 Popup - Traded