I have never had a problem with it except right when Covid hit and the new tenant coming in (newly being deployed to my area) had it cancelled so I had down time.

Or he is exceptionally good and you will need to match that effort for you to get the same return. 

All of your numbers seem pretty solid to me except the expenses.

No payments on anything except my mortgage on my current SFR.  

The unit is working very well except for two bedrooms on the top floor, which don't get much air flow.

Well except the 1 Million Guarantee that's marketing BS. 

If they are the ones to withdraw fully - which is not the case here - you keep the fee however; if.... you are the one denying them after they've been approved - then you should refund the fair (one exception would be if they lied to you on an application), doesn't get much more fair than that.  

My concern was that this park is completely vacant with the exception of two Park owned mobile homes that he is receiving $550 per month rent.

There is no managing as a substitute teacher--except for making sure the students stay on task, are behaving etc.

"Note that there are no exceptions, mentions of a “one year rule” for occupancy or other clauses that allow a borrower to move out of the property after a specified amount of time."