Be sure to have the regular (annual) inspection of those fire extinguishers; there should be an attached tag to indicate inspections.Supply the tenants with (copies of) any manuals for any devices that they have in their units, and advise them to become familiar with the operation of all devices (whether fire extinguisher or smoke alarm or whatever).

They say the plumber says it might be a crack or leak and want to do a smoke test.

And in addition, she has been smoking pot in the unit which is in breach of our lease.Bob's lawyer has asked for my authorization to prepare an eviction on my behalf because Alice is not willing to leave on her own accord.Any advice on what the landlord should do here?

"Hyattsville" seems to be like Silver Spring in that is all over the darn place, so there is that.You mentioned you are a car-less person.

I have a general question about advertising a rental (in Upstate New York) - If I post an apartment listing with certain criteria or stipulations (eg. rent price, pets/no pets, smoking/non-smoking) only to find out that either my rent is too high or I'm leaving out a huge market share of tenants because of a "no pets policy", how can I go about changing my listing criteria without it being considered "discriminatory" against the applicants I have already turned down based on my previous stipulations?

Right now, appreciation is smoking hot but it surely won't last.

When we had performed a walk-through of the property, the tenants had covered all the smoke detectors to smoke pot in the house. #2: we like that unit the best and plan to live there for a long time. #3: we like the other tenants and want to keep them.

If the house burns down and the tenants stuff goes up in smoke that is what their renters insurance policy covers but my insurance won't touch it and I stress that in the beginning as to why they have to get renters insurance.  

Then I read the epic 17 page thread from a few years ago in which you totally absolutely demolished the idea as being smoke and mirrors. 

How much do they smoke and how many animals do they have?