I think there is, or should be, a thriving business in “heat pods”. Fairly simple, just an insulated shipping container with a air heating unit, that sits on the bed of a semi-truck. So a business, like a motel, could load furniture in there, close the door, set a timer, and done. It could even have bays, specifically for mattresses.
And while all the stuff is being heated, fumigation gets all the boogers in the walls, floor and ceiling.
THAT is an IDEA!