You need to know the zoning, setback requirements - and what the consequences could be for removing an existing structure (was it grandfathered under an old code and if removed, the setbacks will be more restrictive?). 

Three-family property located in The Heights section of Jersey City, NJ.

Located in Denver Heights, San Antonio. 2,400 sqft.

At least renewal, you can also raise the rent a bit more than usual and over time that will cover the expense.I would also do what others suggested and casually check their car bumpers for paint and see if their bumper height matches the damage to the door. 

@Harry Maxtens  That's great to hear there are no zoning restrictions for changing it to monthly housing. 

ADA height and elongated.

And BTW - a 2nd home loan criteria usually will not restrict you from having an investment intent. 

Looking in the Madison Heights, Ferndale, Hazel Park neighborhoods but open to other.

Try to get them to see it from your side; you are a reasonable person and would like people to have the quiet enjoyment of their home and thus have tried hard to avoid having many restrictive "house rules", but your intention in renting to them was for them to use this single family residence in a typical way.An imperfect analogy:When Hertz or Avis rents you a car, sure you have "use of it for X days" - but they are not expecting you to enter a race with it at Watkins Glen, or use it to transport 150 bags of potting soil, stacked into every space in the trunk, back seat, passenger's seat, and roof. 

There are no restrictions as to the rent I can charge when I first rent the property, right?