Actually, no. As long as there is an unscrupulous mob taking advantage of the tennants to earn outsized returns, the price of parks will artificially exceed their proper value. Only through implementation of legal requirements or industry self regulation will the prices for parks return to a level that will allow the implementation of tennant-friendly policies, that result in morally defensible financial returns. As long as owners are allowed to screw their tennants and reap the outsized returns, the prices of the parks will remain too high to let the owners who want to behave ethically, do so, and still return a fair profit.
That said, creating a new park with these kinds of rules is something I am actually considering. Even there, the exit strategy will take some thought; I would hate to sell to an abusive new owner who will go in and destroy my community who trusted me with their home placement. Maybe set it up so that it can be sold to the tennants at some point? Following that line of thought, I have not done the numbers yet, but there might be some serious money to be made in financing the purchase of parks by the tennants, and thereby converting them to co-ops.
At the end of the day, I love the idea of helping folks obtain reasonably priced homes. Way back in the day, I developed (attempted, rather…did not ultimately work out) a mobile home residential development. I subdivided a section of land into lots large enough for a mobile home and small yard. It was big enough so that each lot could have a septic, as we were located in the country. I got the parcel transferred to the adjoining school district, which was more attractive, and I was able to develop and get approved by FHA, a tie-down system, so that these homes would qualify for FHA loans. To complete this short tale, I ran out of money before I ran out of problems, and one of the contractors I spoke with about some of the work I would need done, began selling similar lots on his property just down the road…that tore it and I stopped trying.