(That's not my style, but it is what they chose.)You win at "Specific Performance" if the other side walks.

I think you could take it a step further than Mobile Home style parks, and design it to feel more like an actual neighborhood, just smaller!

That’s reallly where I like being, I rather buy 100 doors at $200 per door, than 10 for $900... get decent cashflow today, and the wealth tomorrow type thing.We buy dozens of SF units each month in one arm of my real estate business, which can include the low volume hard rehabs, or high volume turkey style properties.At the sametime I’m also investing my cash into MF directly myself, or via syndications. 

I’m also open to continuing a lucrative partnership, and if we vibe well then let’s keep making money.In exchange, I want to manage the project and design and I have an eye for design, it’s called class, style, perfection!

People dishing out crap advice or proposing ridiculous limitations are speaking from positions of fear.

Every investor will have their own style & preferences, so its important to learn & research what methods/markets will be better suited for your tastes. 

So, if you are getting a DSCR style loan, those types of lenders won't have those types of restrictions. 

At least here in Denver and Colorado Springs, there are certainly homes woth walk-out basements that could be rented out, but there's also a style of home from late '50s, early '60s that have a back door that goes straight down into the basement or turns into the kitchen.

I would not allow tenant to do this as they could easily contaminate the petri dishes.

Option (a) above, but hand the bank some steam-cooked carrots instead - Bugs Bunny style.