Have you checked with the med insurance company to see if they will cover the coast of a rechargeable battery pack for the cpap? This could be used as a temp solution until an inverter is installed and also a backup in the event of a power failure.
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054