I’d think long and hard about this and possibly set up financial parameters for who is responsible.

If you need 10 minimum and have to hold those non-paying tenants until you get 10, what does that cost you in your financial model?

While both involve finding and properly securing a site and bringing it to full entitlement, the ground-up process includes the land piece but gets way more involved and complex to execute.The full "Monty" for ground-up development needs to include financial literacy, an explanation of metrics, and how they work.

Sounds like you are in a pretty strong financial position.

Building equity in your house is one of the biggest financial advantages of homeownership.

Just stay flexible and be ready to adapt to market changes or your own financial situation.

Belize is super picky on financial transactions due to US drug traffic monetary controls.     3.   

Trade some comfort for financial stability.Part of attaining financial success is being simultaneously optimistic and paranoid. 

Given your comments "A rent increase of almost 40% is unconscionable" and "Also, SCI paid more than what this park is worth" I am forced to conclude that you have inside knowledge of the parks financial operations.

Without knowing any of your financial position of your work or side hustles it is hard to give you exact advice because you may be able to carry these homes until they are paid off and in that case they would provide solid returns, but there are likely better real estate investments out there.