It was just too difficult to keep up with my GC and permits.I appreciate the advice!

In strong sellers markets it may be more difficult for unrepresented buyers and they may choose to get a Realtor but this is the market dictating the circumstance and not the NAR.

My availability is not the same as everybody else's, so being told to man the phones is quite difficult.

Now after all that, you have to go to a lending institution a second time and try to get a loan and there are many requirements to getting loans in todays environment which make it difficult.

You will have a difficult time selling the park with the house attached down the road even after you fill it up and improve the CAP.And a second word of caution since I am sitting here spewing advice... those two vacant TOH homes depending on condition and the 6 vacant spaces should have zero value in establishing the park's value. 

I also want to get a house in their current school district (as living with this family member is becoming too difficult).

And, according to their book, if you want to later evict them, having them prepay that much can make it difficult to do so. 

The high HOA fees plus taxes plus wear and tear and the intense Airbnb competition (tons of units) in Miami make it difficult.

Also, the problem with the traditional approach is that the easy clients subsidize the difficult ones.

Keep in mind mix-use real estate is generally more difficult to finance than multi-family or residential real estate.