Bedbugs are very heat-sensitive - raising the temperature over 125 degrees kills every single one of them.
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.
Yes, and it is particularly inexpensive to tent a house and raise the temperature to 125 degrees. Especially in the winter, would only be 100 degrees higher than it is here right now.