You can take it one step further and ask a realtor or someone with MLS access to pull which zip codes the most cash buyers are looking if you want to find hot properties to flip and sell fast.

I know he doesnt think of me at all [I am a single parent of 2 doing my best & pulling from every direction I can to move up in the world]. 

I've heard of guys getting up there with a brush and a bleach solution, but it's usually for something like a patch of moss.

I know getting your own RE brokers license would be a solution but anything else that can be done about this possibility?

As suggested the solution is to send him notice to not contact you directly in the future, block all communication,  and I would strongly advise that you tell him that you will release him from his lease and, if your state codes allow it, you will not be renewing his lease. 

This doesn't even consider the overhang on the trailer from the rear axle to the back of the RV, so there is a tail swing factor when backing into or pulling out of these units. 

Will the Rehab that you have effectively done make up for a market correction thus allowing you to pull equity from the property to properly Repeat the process or do you just have to wait for the market to bounce back before you can refinance?

I made him pull over when I saw the For Sale sign.

If you have any cash flow after paying the bills and setting aside funds for future expenses, you can either pull it out or (preferably) hold it for a future purchase in the checking account or in the savings account.I prefer holding funds in the savings account, even money for future purchases.

Refi is preferable if the money being accessed is for longterm purposes (ie buy/hold) and you plan to purchase another investment soon whereas a Heloc is preferable for short-term use (flip, rehab, etc.) and/or you want the ability to pull the trigger in the perhaps distant future if/when a deal presents itself.