They should also have proposed or preliminary site plans approved for the remainder of the development.

I've had a long career in community development and have a lot of bank contacts that would likely be interested in investing, but I'd need to prove the concept first with an initial fund (there are also a lot of other community development tools that could be leveraged to maximize and scale this).

The mirror house is very interesting.

I actually recommend house hacking as a first step if possible. 

After 20 years as an investor, broker, and lender, I can tell you that house hacking is one of the smartest ways to start.

Quote from @Victor Yang: If I gift a house, what amount will go towards the lifetime gift limit, the amount i purchased the house for, or the current FMV?

The good news is you don't need a specialty loan for a house hack, just a traditional primary home loan.

I was in a similar situation for my second house hack.

Right now, I am an aspiring real estate agent specializing in investment properties while also in the process of developing an app!

As you develop the park I would strongly recommend your homes be individually metered for water, sewer expense prorated and garbage paid by tenants via individual can service.