As noted, running an A/C, either 12VDC powered or 120VAC through an inverter, requires MASSIVE amounts batteries and the solar panels to charge them !
I would look into installing a residential mini-split heat pump (they have various interior air handlers). You can get rid of the A/C and the furnace. If you are willing to live without hot water (or only on shore power) and switch to an induction cooktop, you can eliminate the LP tanks completely and install the heat pump compressor there.
As for a generator, get rid of the built-in one and buy a small portable.
