1. I would ask the OP if he might tell us more about the burned wires he's been finding. Internal to the P, or external, house wiring? I can imagine there being serious locked rotor amp draw on air conditioner startup, possibly spikey enough not to trip internal protections. Photos?
2. It's unclear to me whether Oldman is still just trying to patch something together for limp-home mode, or whether he's seriously considering embarking on a Rube Golberg approach to RV power inversion, from the esteemed fountain of Rube Goldberg approaches.
3. In this situation Amazon is your friend. If you need a small inverter you can get one overnighted to your campground, while you wait for your Victron to show up in your life. Perhaps you're hesitating because you feel unworthy? Give in!!