Even if they swear they'll never smoke inside, they will, and will drive your other tenants nuts and it's expensive to get the odor out.Get your tenants to pay online so you aren't chasing the rent check.Be direct with tenants. 

Very unlikely, @Macklin Baldwin, unless you get a smoking deal.

Things like cracked window, not strapped water heater, missing smoke/fire alarms that the lender wanted rectified. 

I have sort of the opposite problem, my tenants in the unit with the thermostat for the whole building boiler would open their windows in the living room when they smoked weed.

Says it gets in the way of his cigarette !!! 

Showing before even knowing how many animals they have and how much they smoke will never be solved by software. 

(The good old days when you could make a lower offer on an already smoking deal) How did you finance this deal?

Upgrade lighting if there's any dimly lit areas, install ceiling fans in all bedrooms, replace toilet if its old, new locks on all exterior doors keyed alike, new numbers on mailbox if the other ones are ratty, make sure everything works, no faucets drip, smoke alarms all working and in all the places they're supposed to be.

some things a seller may be required to fix by law (smoke alarms, septic), your RE agent can tell you that.

This leaves him approximately $200 extra each month he can pocket.Now, I'm not sure that is how to calculate vacancy rates, cap expenses, or repairs/maintenatnce, so please let me know if my understanding of the concept is off.I tried fiddling with the Buy and Hold calculator with these numbers and recognize his situation is not a smoking deal.