It is my experience that with the rent credit program, the capital you have tied up in the POHs slowly erodes away until you sign the title over to the residents. Then you are left with nothing but vague memories of the far gone days when your net worth statement had a big, six figure, asset line item called Park Owned Homes.
With the CASH program you get the capital out of the home as soon as the deal closes. Do it enough times and maybe it's time to go shopping for your dream home.
I propose a third way; having a third party professional prepare the loan docs and doing an owner carry-back. Then selling the notes in the secondary market.