He may be correct that the entire building requires treatment.

I have one now that doesn't show well but we did get the owner to pay for a deep cleaning and carpet treatment.

I’d say don’t call me unless the building is visually on fire ! 

They are paid through Paypal, FB payments, etc.I have quarterly insect treatments at the cabin and they have my card number. 

Get multiple bids, check contractor references, get visuals of their recent work.

Generally you have them do a visual inspection as well.   

The world thinks a lot less of my probity than it does of yours.But your response does remind me greatly of the time I submitted a paper in a nursing class that pointed out the obvious fact that that Big Pharma has minimal direct financial incentives to direct their research budgets towards finding one-time cures and maximum direct financial incentives for putting money into finding ongoing treatments for chronic diseases.I got a D with a big circle around it and a denouncement by the nursing professor with the side job in Big Pharma for being so bold as to point out how math works.

Creative; strong problem solving and visualization abilities.

Grow faster, resist treatment, etc. 

Looks like you got the bait-and-switcheroo treatment.