Or maybe the home of your dreams with an additional dwelling unit that you can rent out to soften the mortgage.It's all dependent on what you're comfortable with vs. how little of your mortgage you're willing to pay.

Without ever consulting me, in one instant he had the plumber put in an 'emergency' water line in the yard, disconnected the water heater line, a bunch of other things that ended up costing my $5k to pay for services I did not want and to put back together the mess that was made. 

With 60 days notice, you may offer to transport them to another dwelling of their choice. 

The state requires at least one parking spot per dwelling unit.

IN DETERMINING WHETHER ALL OR PART OF THE RENT DUE AND OWING IS THE RESULT OF AN UNCONSCIONABLE RENT INCREASE, IT SHALL BE A REBUTTABLE PRESUMPTION THAT THE RENT FOR A DWELLING NOT PROTECTED BY RENT REGULATION IS UNCONSCIONABLE IF SAID RENT HAS BEEN INCREASED IN ANY CALENDAR YEAR BY A PERCENTAGE EXCEEDING ONE AND ONE-HALF TIMES THE ANNUAL PERCENTAGE CHANGE IN THE CONSUMER PRICE INDEX FOR THE REGION IN WHICH THE HOUSING ACCOMMODATION IS LOCATED, AS ESTABLISHED THE AUGUST PRECEDING THE CALENDAR YEAR IN QUESTION;"  This sounds like you can still increase rent but it will based on change in CPI for the area. 

If your partner puts a sign out up front where its visible then locals might change usage of property from residential dwelling to commercial business so keep that in mind..

An alternative would be to find a single-family home with enough square-footage to do a permitted accessory dwelling unit (ADU).

I have a small network and seems like we can find deals where the purchases will be in a good location, will be priced below market and will have instant equity.

The land will cost $50K and to build will cost me $225K, all houses in subdivision are going for $468K and up, so I will have instant equity.

It's likely that the agent who owns this property can prove with a zoning certificate that it has 3 legal dwelling units, though it would ultimately be up to the buyer's due diligence to prove such.