I was renovating a single family garage today (full installation) and when I came to check on the finished work, the workers basically created four holes (two doors) on the ceiling.I'm looking to find out what I can do.1.

It sounds like you’re in the driver’s seat though...

It turns out her old landlady in a similar situation had brought out a contractor and made a lot of noise about replacing the whole vinyl window, and finally charged her $70.00 for an entire new screen frame shipped from the window manufacturer.Same landlady who ate my tenant's security deposit and had never heard of giving notice before banging on the door.

This one in particular was a personal home for us that we'd reno and refi, but would have enabled me to go from 1 to 3 doors once complete.

They are just quick & dirty ways of doing cocktail napkin math on properties. 50% rule - The costs to operate a rental property typically averages out to 50% of the gross rents on an annual basis. . . .One question that comes up often on BiggerPockets threads is the net profit (free cashflow) per door.Some say $100 per door minimum or no deal.

Guys, this one misses the mark on my goal of $200 per door, barely, and I'm missing the cash on cash ROI with this house as well. 

@Brandon PellmannI’m buying another 50 units in KS MO instead. 10 cash on cash 20% IRR per year.Already own 26 doors going to 75+Staying w what I know

"Driving the area" using Google Maps I would rank investing there as the same risk profile as investing say New Kensington, Brackenridge, Aliquippa, etc.I am not sure of the economic drivers in that area, on the bright side it's NOT in a flood zone :)

I could simply frame a door opening between the 2 units if I wanted.I suspect in your case you would take your best guess at which local building department has jurisdiction. 

Remote locks, security, intelligent door bells, Alexa etc.