Keep in mind that you will have to bridge a limited relationship with the park manager and let them know that you are a family friend helping the seller to sell the property.

@Jeff Bridges has some good advice. 

So you can do a few pulls to get your bridge financing, then do a few more to shop for your refi and it will only count as 2 pulls.

And He said I had mistaken the term balloon payment for what is actually a bridge loan.

@Jeff Bridges  Your math is pretty accurate.

Iron Bridge in PDX2.

This essentially means the management company is merely a bridge for the owner to have access to a franchise as well as added benefits and resources (this can be HR, accounting, purchasing, etc.)I am not familiar with the deal you have on your desk, but I would approach with caution.

Also consider, there are the 2 new bridge projects getting underway now which is going to bring many jobs to the area over the next 10 years.

I've also used credit card checks to bridge my cash gap. 

Investment is not black and white; burning bridges as someone new to the investment world will hamper your ability to expand.