Jim...........
You have your priorities absolutely, positively, 100% in the correct order. I was just joking, obviously..........
My arrangements have come to this after 35 years: The upstairs is hers. I will build, repair, replace anything and everything that is identified as needing to be done. The outside of the house is hers. No front yard, no back yard, entirely gardens. With shop-made hose manifolds, timers, etc. Again - I will do whatever is instructed.
The basement shop, though...........That's mine. Including, I might say, the laundry room - I do that chore. But the stuff in the shop, and any structure, wiring, Blue Spruce, whatever......
Reminds me of the Arthur C Clarke book: 2010 Odyssey Two, where the message came across:
"All these worlds are yours, except Europa. Attempt no landings there."
BTW - I think you've nailed it with the planned 10ga, etc. Wherever you end up, you'll be good to go.
When I started woodworking, I didn't know squat. I have progressed in 30 years - now I do know squat.