We had this exact problem and did not have 1-2k to call in a pro for heat treatment.
Here is what we did:
-First empty the room of all but furniture, ie all clothes off floor, etc.
-Everything that can be thrown in the washer, clothes, curtains, etc wash and dry on hottest setting.
-anything that cannot be thrown in washer like luggage, etc leave out in the sun on all sides for a few hours
-wrap all pillows/mattresses in zip covers from Walmart/target/etc.
-make sure no blankets are hanging off bed or touching floor
-get 4 plastic containers fill ½ inch w/DE and put legs of bed in the containers on floor
-vacuum/sweep/dust thoroughly
-keep door of room closed off when not in use
-leave legs of bed in the containers for 3-4 weeks making sure no blankets ever touch floor and if they do, wash in hot water.
-periodically when no one is using the room, sprinkle DE on floor and leave there a few hours and vacuum it up
The idea is to coat their only pathway to the bed with the DE and eventually they will all eat it.
-to the extent the DE is a “inhalation hazard” if you are going into the container and actually snorting it, then maybe you’ll have a problem. The person whose room was infested in our house has lung issues and it did not affect her at all — and it has been a several years already. It is a perfectly safe product and is edible for humans. DE is by far the most cost effective and least toxic remedy.
This worked for us – no more bedbugs and we didn’t have to spend $2000. Hatzlacha.