Start by doing to your various departments in the jurisdiction of the park to determine if the park can still operate as a park and what you would need to do to accomplish this.
Some areas have odd rules when cities expand (don’t ask me how I learned this) which may prevent the park from operating after a vacancy of a certain time period (say 6 months).
Then there may be concerns such as electric upgrades. Many of the older homes were set up with 100 or 150 amp panels in my older parks for example and the newer homes need 200 amp panels. This upgrade can be expensive.
Septic inspections will likely be a first step but in my area this means they walk the park looking for puddles and stink which since the park has been vacant for 14 months is not likely to be the case.
Despite this “gift” you need to conduct your due diligence as if you were starting from scratch.
This may be a great deal or you may find like many deals have taught me is that “free” ends up costing me more but your due diligence will be the deciding factor.