I think bedbugs are a great opportunity for an entrepreneur.
A big problem with bedbugs is that they and their eggs often escape fumigation by hiding in tight crevasses and in air pockets in furniture.
However, they are very sensitive to heat. Just 115F for an hour will kill them and their eggs. So if a room is sealed, using a ground level air convection heater to raise the temperature in the room, down to the floor, to say 120-125F would wipe them out.
If it’s unpractical to heat the room, then put all the furniture in a heated semi truck. Very few of such dry goods are so sensitive to heat that they would be damaged by such temperatures for just an hour.
The use conventional fumigation in the empty room.
Freezing also works. The Fairfax County library system brought in reefer trucks to freeze their books after it was discovered that bedbugs had infested the spines of many children’s books. Funny how there has been no follow-up on whether or not that was effective.