Tell them to not put any indoor furniture on the outside porch or else I'll get a ticket. 

Another problem with low clearance on a stairway is that it makes it difficult, if not impossible, to move furniture to the second floor.

IMO, it depends on the property and the furniture. 

He could probably rent a run down house for $400 a month, but it would have no furniture, no washer/dryer, no utilities, no cable, no wifi. 

I have only when question, do you buy furniture for the entire house every time?

Being ready to lease, but finding out that you need to repaint the house 1st after furniture is moved out means take your time. 

repainted and upgraded some furniture and artwork What was the outcome?

Strange furniture. 

You probably need to provide all appliances and partial furniture to help tenants out. 

There are rules on what can be capitalized (ie. major repairs, appliances & furnitures) and expensed (supplies, minor repairs, decors etc.) depending on the nature and timing of the transactions.