What one infestation costs
The room leaves inventory. The mattress and box spring are usually written off. Treatment runs across the adjoining rooms too, because bed bugs move through wall voids and outlet boxes rather than staying where they were found. Then there is the review, which outlasts all of it.
A sealed encasement on every bed does not stop bugs arriving in luggage. Nothing does. What it does is stop them establishing in the one place they most want to be, and keep an incident inside one room.
Bargoose encasements are tested bite proof and escape proof by Snell Scientifics, closed with the patented BugStop® Seal.