Smell and look for mold, termites, rodents, birds, bats, and critters. 

Their response, “Smells like money Dad!!”

There are several videos on YouTube and guides on how to get smome smell out of your house.

Also a side note does anyone know how to get the pet pee smell out of a house?

Now there is just over a month’s vacancy after the second one - still looking, but with a new PM that I found on my own.The new PM recently advised that, despite deep cleaning of carpets and painting, there is a strong (bad) smell after a few days of no open doors/windows - the new PM advised that when they first saw the property at the last tenant’s move-out, walls were filthy with grease and grime, and the carpet had food pieces in it and looked like it had not been vacuumed the whole duration of the lease (11 months.)

If you cannot stomach this process I don't blame you, when I do it I smell money nothing else lol, but at least now you'll be armed with this information the next time your pumping guy comes out to service the tank.

I do exactly what he does.I do both currently .. the lending type activity is my cash flow like those that hold rentals.and the developments are my big hits.along with new home construction.. we are weaning off of doing fix and flip.. as those can be a little more risky than the new construction. and by that I mean you don't really know what you have until you open the walls.with the new construction I can hit my numbers within 2 to 3% every time.. so easier to manage that way... plus a hell of a lot less competition.. every body and their mother and brother is chasing the same fix and flip.. not so in ground up.. takes another skill set and frankly a little more financial horse powerwe will do 40 plus homes a year and have been for a few years now.. with average profits in the 40 to 50k per home range these are selling for 350 to 750k.. bigger ones we can hit 100k per door and I have hit a few in the 150k per door range.. along with very favorable finaincing form my banks at 6 to 7% apr and only pay on drawn funds.. the return on equity or cash is easy 100% per 9 month build and sell cycle. the lending we do is niche and its really NOT lending ..

If someone seems undesirable for subjective reasons (car is filthy, person smells of smoke, pushy demeanor etc) why on earth would you then move forward to a credit/background check which may come back favorable and now you have to explain why you are rejecting them?  

I wouldn't walk there at night without an AR-15, 2 Glocks, body armor and a military escort.  

Eventually they begin to smell and there really isn't much that can be done other than to keep cleaning them over and over.