Irrespective of all of this your test ad will reveal the demand for housing there. You will be more affordable than the land home deals being owner financed. As a result you can offer either lower monthly payments or a faster road to ownership, maybe both, which will be more attractive to a set of tenants who don't like maintaining a yard or don't have the financial means for both the home + land.
Your test ad should take this into consideration and look at comps etc when evaluating a price point to either rent credit, rent to own, cash sale, or whatever your plan may be.
There are many areas where MHP's are stacked up next to other MHP's and Buyers have similar concerns. If they're all full, except the ones terribly managed then you still have a winner and the test ad will confirm it.