Improved occupancy, reduced delinquencies and enforced late fees, added a website and marketed vacancies.

The benefits of a new system on reduced capex are nice, but installing central air where there was low-maintenance window units before seems like a wash.  

Improved occupancy, reduced delinquencies and enforced late fees, added a website and marketed vacancies.

Second, how can the park perform after I optimize income and reduce expenses to where they should be. 

Do you want to be dealing with this for the next X number of months, all the time, effort, energy spent (maybe legal fees). 

Any suggestions on executing this type of multi transaction and reduce my closing cost in terms of Title+doc fees?

I have a friend who wants to rent our property and we're willing to give them a reduced rate while they look for a home in our area since we are travelling. 

You should consider accepting them and then find a way to screen them to reduce your risk and monetize them to increase your income.I require all animals be screened through petscreening.com which includes copies of vet records, picture of the animal, and more.

OP wanted to know if NY state grant exemption to homeowners, as they do in Florida, thereby reducing their taxes, and if so, by how much.

Adding the new HELOC will reduce the score about 7 points for every $100000; it too will change the score lower by 10 if you cash out 100% of the line.