There is already a substantial domestic population living in D and C housing.

Further, many (again may not be a majority, just more than another group) have life’s “out of control”; domestic violence, drive by shootings, kids with gang affiliations.  

That's at least 10 bathrooms, 10 kitchens with all new plumbing and electrical. probably new hvac too.

Permits will also be required for your plumbing and electrical work.So, what if they catch you?

So I’m in a bit of a bind, I have a duplex I’m house hacking we remodeled entire thing, new hvac, electric panels, electric main, updated plumbing, water heaters, furnace, install central air, roof.

Oh yeah, it opens an artery on them, because the better DOMESTIC economy goes local small business wins. 

So, given you are in a lower end area with lower rents, you need to reserve more money on repairs, maintenance and capex compared to a higher rent area, since that $200 HVAC or plumbing service call is 25% of $800/mo, but 10% of $2,000/mo.  

The new bathroom will be constructed within the existing structure, and while electrical wiring might be needed, plumbing installation is definite.

If a deal doesn't work if you have 3-4 worst case scenarios in plumbing, electrical, etc... then it wasn't purchased well enough to make it worth the time and effort. 

After securing the deal, the buyer made my wife and I go through three-feet deep of snow to "winterize" the house so there wouldn't be any plumbing issues.It was a 2 hour drive there, and a 2 hour drive back.So much time and effort put into it for only $4k...