Sell or refinance the property to clear the existing loan. - As mentioned above.

I am starting a park that will end up with roughly 20-25 lots on plot of land that's roughly 20 acres (including an existing 4/2 house).

If your success hinges upon only having/finding great tenants, you may be in for a rough ride.I ask because my existing rental house actually only brings me $150 "pure cash flow" after I ran it through the BP calcs.

Does something like a "property maintenance company" exist?

The company that owned them no longer exists.

In saying that, the redemption period only exists if proper notice is actually given to the IRS by the foreclosing trustee.

The 1% rule however does not exist. 

Adding ADUs and renovating the existing units.

What this lender  failed to understand was the taxes that showed as delinquent were from the previous parent parcel tax ID that no longer existed.  

Background: Oakland multi-family (4-plex) propertyScenario: Existing tenant would like to add new occupants (2 relatives) to an existing month-to-month agreement. 1) Should we add the new tenants as master tenants or simply as authorized occupants?