Stick a tickler ad in craigslist and in facebook marketplace for each of these things -
1 ad that is vague with park location, just the city, just that you have vacant spots to fill and you’ll give them like, 2 months free rent, see what you get. (build a list with it)
1 ad that says the basics of the homes you are trying to fill that are vacant, ( like … we have 2, 3, and 4 bedroom homes for sale/rent @ prices from this to this) and post in both locations again, - see what you get.
Are the vacant homes in the park you are looking at livable or are they tear downs? or Handyman specials? Are you wanting to rent them or move them off or sell them? Are you willing to carry the paper?
What are the bonuses to living in that park? Is there a clubhouse, a pool, things for the neighborhood kids to do besides break into houses and steal cars? etc.
The park I take care of is in the basically worst part of town and I have a wait list because inside my park, its clean, quiet, friendly, and people take care of their stuff. The money in the neighborhood is not as important as the quality of tenants that can be created with management that is firm and fair and educates the tenants on their responsibilities. If the park looks bad and you can immediately improve it with paint and good staff and landscaping, people will flock to you to get in there. Even if the homes are in poor shape. Even in the poorest part of town.
Run the ads (they are free to run in my market, hope the same there) in different formats over the weekend, you’ll get the most hits between Friday and Monday morning to get a sliver of the market.
What it sounds like is the park is in need of strong healthy trained staff to make it full again. But I bet you, it could be filled up within about 18 months with good looking homes and tenants that want to be there if conditions are right, coming from the management/staff side.
oh, one thing to take into consideration, why are there so many vacant units? were they rentals or did something break underground - water/sewer/power lines damaged - super important infrastructure questions to ask about so you aren’t out $50K+ in repairs straight out of the gate.
… lemmie know what happens hope this helps.