If you still have an electric bill after putting up solar panels, you didn't do your homework, have the right contractor, or the right lease plan. A properly sized solar system with a few battery backups should have you TOTALLY off the grid, maybe even selling BACK to the power company if sized right.
If I were building a home today, ANY home, I'd have following incorporated into my building cost/loan:
1. Solar on a metal deck roof
2. High-efficiency mini-split systems for heating/cooling
3. High-efficiency water heater (or on-demand gas heaters like in Europe).
4. In colder regions, most insulation in roof and walls
5. In colder regions, fire place with an additional pellet/wood stove properly designed with deflectors and engines to circulate warm air
6. In colder regions, I'd have glycol floor warming in the slab, and also in the driveway. Separate loops for under pavered driveway, no concrete or asphalt.
7. The best Anderson coated windows for privacy and also to block UV and get the best U / R-values.
I'd do all of the above even I had a manufactured home (higher tier than trailer mobil home) built to my specs on slab. Hell, that's what I'd like. Built to my specs, in a facility where they specialize in building homes, and then delivered and placed on my slab. There's a lot here in Pennsylvania that do just this.
Yeah, I'm in architecture/MEP my entire life. :-)