There are model programs with all the major MHP builders to bring out models to your park, then you can sell the unit, and collect your lot rent.

Collections is a big part of land lording, get use to it.

I have no need for the rent collection or tenant screening as this is a function my property manager does for me. 

But if you want access to the benefits that people like me have contributed to, and collectively spent decades and god knows how many millions of dollars building, why would you think you should get access to those items for free? 

For rent collection, sending an invoice on the 20th greatly helps with getting paid on the 1st. 

In exchange, I'm thinking that she would collect all the cash flow and potential equity until I refinance and get the loan originated in my name...

There appear to be some new startups offering to pay up to 50% of the down payment on a house in exchange for around 35% stake in the house (they collect this upon sale).

Agreed but if they sell a property, that’s less fees they’ll collect every year and you’d want to sell the worst property which would be a significant hit.

Is a PM allowed to share the tenants application including credit reports and other info that is collected during the application process?

The average tenant is very difficult to collect from depending on your state's laws.