As a non EU citizen, I will need a permit to purchase certain types of properties, except for residential (unit in an apartment). 

Any violations, open permits, etc.?

If the lender does not permit this, your attorney and CPA will have limited options.

To @Mike Dymski point about density bonus for low income they tried that with new builds and that caused a rush of permits to go in before the law was past and very few projects after the law. 

Quote from @Kevin Akers: If you have everything else in place (financing, permits, etc) and have underwritten the deal where the numbers make sense you can work on raising the 50K from private investors. 

We aren't permitted to charge tenants utilities unless they're separately metered in Delaware

The big play for tax sale in CA is bare land in the high deserts and in the areas that have a lot of old recreational communities were lots never got built on.

Quote from @Kar Sun: It appears the law requires you to allow them to attend, inspect together, and mutually agree to a list of damages: https://codes.findlaw.com/tn/title-66-property/tn-code-sect-...Print that off and follow it.Make it clear to her that she is not permitted to bring guests.

If your lease has that clause (and assuming your local laws permit), consider notifying your PM of you intent to escrow your rent payments until the situation has been corrected.

For instance my 90 lot subdivision at one point I had 90 legal descriptions and parcels on one master deed.. as I sold them off we just deeded them out separately.. its super common especially in older platted cities were lots might have been small like 25 X 100 and someone bought 3 of them and then built one home on all three.. some places they force merge them others you can go back and recreate the Old lots of record.. there is millions upon millions made by those that know how to find shadow plats and bring to life underlying parcels.