That would be your best bet.

Those are the first things to go (relative to a primary residence) along with the sports car sitting the garage.  

Your best bet is to request the unit to be serviced, and if results are not to your liking, come to an agreement with the LL to exit your lease early, and rent somewhere else. 

Best bet is to check with a good commercial appraiser in the area or a competent broker.Good luck! 

So that's my question, would you rather go after a cheaper 20-unit that takes more selling, more maintenance, and more marketing but is an overall safer bet, or fix and rent a nice single family home but risk overpaying or having your only unit vacant too long.

I'm betting you can find a viable reason to evict her for.  

In a great school district you may get an initial lower ROI but in the long run it may be higher when you sell the property because it is usually a safer bet and the appreciation will most likely be strong.

Vacancy control is illegal in CA, and I'd bet most states.

We have an off-market lead funnel we use to identify deals before they hit the market, but your best bet in our area for on-market deals is NOT day one on the MLS, it's having a hot sheet set up by your agent that tracks all REO/short sale deals that are back on the market.

I bet there is not vent (supply air) in the room and you are not getting enough air movement with the door shut.