Facts from internet:
Bed bugs die @ 113 F if held for 90 minutes.
Bed bug eggs Die @ 118 f if held for 90 minutes.
Bed bugs in a room die if it is air temp is held at 135 F for 4 hours. (The floors and walls need a chance to reach the killing temp and duration. )
___________ begin _____________
Shipping
containers are sometimes used to move furnishings from one house to another for people moving.
You build an insulated cave located along major highway that you can drive the container into or back it into. Then give the whole container the heat treatment. And then go on to your destination assured that the beasts are dead.
Container could be focus of large solar array, heated by tax deductible solar photovoltaic s, or gas fired heaters. How they reach 118 degrees F isn't too important.
Shipping container come in at least 6 sizes:
In Feet All 8 wide.
10 x 8, 20 x 8, 40 x 8
10 x 8.5, 20 x 8.5, 40' Long x 8.5' tall
So any cave/enclosure should grow or shrink to cover these at least.
(Do it yourself moving trucks might require heating the entire truck in a similar insulated cave. Just hope the heat doesn't damage the plastic those trucks seem made of. )