Outside of the police report, I would just ensure all window and doors lock or functional.

I'd be looking at multiple structures. we try to build below the average new build cost in our market in Columbus Ohio which is 515,000 last year and we target land 40-50k and urban core adjacent where we get higher price per square foot. we build for clients with margin around $190 a sq ft depending on multi or single. we can get that down in our triplex it's a little higher on our single family homes because of garages and limited economies of scale. hope that helps. idk Philly but if you show me the area and styles of homes I can give you some more insights. 

I've lost track of how many doors we've acquired from them. 

~225k per door

I remember visiting a buddy’s place in Austin years back..he had a similar setup over his detached garage and was convinced that adding a window unit and some carpet would let him count that space towards the home’s total square footage.

Doors are irrelevant.

@Meghan McCollum  - At one point, I had roughly 40 doors in Duluth.

I currently own 10 doors, and always looking for more, when the deal makes sense.  

Along with the dwelling unit described herein, the Premises include the following: (i) _____ Storage Locker; (ii) _____ Parking space(s) (Identified as _____ and containing _____ parking spaces (also see Section 9 below); (iii) _____ Garage (Identified as _____ and containing _____ parking spaces and _____ transmitters (also see Section 9 below).

For our ADU (garage conversion), I am handling the design/engineering and then selecting a final contractor once its permitted and ready to go.