I just recently purchased a mobile home park which has 4 vacant slots that I plan to put trailers on.

If you've leveraged yourself out maximally, refinancing your property every chance you get and keeping razor thin cash flow might result in negative cash flow if things turn.

house or you need to 'free up' that VA loan slot for something different, or if that $250 negative is keeping you from something else, I'd keep it.

I hear he's afraid of electric razors!

Anything beyond that is usually entertainment and heavily edited to fit in a nice 30 or 60 minute viewing slot and has a producer setting up/staging the "drama" that we see unfold during the show.

A mini shark tank if you will, to diversify.

I'm trying to understand if I can legally advertise these spots (3), perhaps put more, as long-term RV slots.

In the area where I invest there is an old 16 unit, built in the 20’s, lots of lead paint, asbestos, vermiculite etc.

You will need smart people to shepherd you through the noise and sharks.  

If so, at 15% APR, your loan is usurious.The penalties for making a usurious loan can range from jail time for loan sharking (extremely unlikely, unless you're involved in organized crime), to forfeiture to the borrower of all interest owed, to payment to the borrower of triple the amount of interest collected the year before the borrowed brings suit.