While a “counter offer” does negate an “offer” a request for additional concessions/negotiations does not negate an executed Contract.....the key here is the difference when responding to an offer verses a contract.

I could always try to buy 3,000sq/ft from a neighbor but that is something I haven't done before and I am just to busy to learn any additional new tricks at the moment. 

In New York isn't there some additional Mortgage tax fee tacked on?

Additionally, I've gotten in contact with a few VA Loan lenders as well as a real estate agent in Florida, in case I decide to buy a house. 

However, I would not send them additional money (I am not that soft).

In addition you can not prevent outsiders from using the equipment.

They are all rented and it looks like there could be a decent cashflow from this acquisition however my concern is that when I would try to refinance out to get my cash back, that the appraisal could be lower based on the mobile homes, has anyone faced anything like this before....I know this sounds a bit crazy so any info would be most greatly appreciated and if there is any additional info you need from please let me know thanks

The ones I have met were notary public officers (like me) and took the course as a way to make additional money.

Additionally, make certain that you disclose that you are a licensed agent, and I would highly recommend that you get something in writing from the seller, signed, stating that he understands you are not offering to represent him as an agent and are entering into the purchase contract with the intent of making a profit. 

I had the opposite situation, where there was already an existing 2nd floor addition "bump-out" with nothing but the patio underneath.