The two RC’s are best split between the two 30 amp feeds (7,200 watts) On my 38e, the induction stove, salon rc, and one other smaller draw are on SP2. Most of yeast coast boats have a 6kw gennie. I have had to power manage occasionally but not very often. There is one Helmsman 43e with a 50 amp feed with three TV’s at Bay Bridge Marina (Chesapeake). It has a larger gennie (9 kw) too. He does not have an isolation transformer. At the time it was built, sourcing one was a problem. His boat doesn’t deal with power management issues. If I had it to do over, I would go with 50 amp (12,000 watts).