I have 1-2 big jugs each type of cleaner at the hub and provided the cleaners with labeled spray bottles (Sanitizer, windex, fabuloso, etc).

Leave a friend there to crash because their house is being sprayed.

Todd one straightforward strategy for addressing damp crawlspaces is to apply --closed cell-- (not open cell) spray foam to the entire underside of the flooring deck of the home, provided you have some sort of sheathing or substrate below the finished flooring.

Then spray the stuff that kills the smell and retile.

I used a 'thrifty' plumbing company with fixed costs of $99 a job plus parts.Well this is what he charged me for the sink installtion after I got new countertops:$99 sink installation$99 sink seal$99 facet installation$99 extra spray nozzle on facet$99 drain installation in sink (it actually came in the sink and old drain pipe was in place already)$99 dishwasher hook upSo with taxes it was right under $650 for just labor! 

He is spraying with 2 coats oil based primer and 1 top coat oil based.

Correction, I was woken by my 2 small dogs barking at the sound of what I thought was my shower running full-blast.Once my OMG-is-someone-in-my-house-taking-a-shower panic subsided, I walked into the master bathroom to find the water supply hose detached from the toilet and spraying full-blast at the bathroom ceiling and about 2" of water on the bathroom floor.

My handyman suggested simply using a can of flat white spray paint.

Do you think that just spraying the perimeter and around window/door frames with your own bug spray would do the job just as well as spending hundreds on a professional?

I would not let a tenant install spray foam insulation in an apartment.