They can’t close the park by changing the zoning overlay. You can fight that and will win.
Here’s the catch. You will end up spending +$100K in legal fees and your time and energy. If you have not closed on the park yet, I would seriously consider spitting the hook for greener and more welcoming pastures.
I am in the middle of a similar situation. It’s been 2 years of delays and legal fees. My original plan was to rehab the Park and fill it up. It’s taken so long I have bought 3 more parks since then. Each park is cash flowing nicely, while the one I want to rehab is barely chugging along. I’ve got a ton of time and energy into it now and I would be hard-pressed to stop. I figure I have another 1-2 years of battling before I am able to break ground and rehab the park. Then I need to fill up the empty spots.
My legal bill for last month was $20K. Just for one month. I am in it over $100K and am looking at another $+100K to see it through. Well, $200K is the downpayment on a small park. The only reason I am willing to push through this is that once the park is rehabbed and filled it will be worth over $+4MM. So it’s a pretty easy calculation.