@Tim DiMario- thanks and welcome ...I would recommend getting formally pre approved for a hypotehtical scenario with a lender ...This process will help get you organized / prepared and its free ...you will also learn a lot ....if you never  buy anything or dont buy anything for soem time - its  OK ...good luck

Fannie & Freddy do allow a 5% down owner occupied scenario. 

I won't dive into that evaluation here, since this thread is about due diligence, but just keep in mind every park is unique and without understanding all the variables, it's pretty common to misinterpret the value the park.

Here, it seems the fact pattern is in your favor but what is the best case scenario?

Conventional won't work in that scenario but could if you're talking multiple separate properties. 

If so, what is a common percentage range?

You need to match your self and your scenario with a lender who offer unlimited products and programs with prime rates.

Common fees will include a set-up fee, a leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

First is househack where we share common space between tenant and owner ; and second is househack where we do not share common space between tenant and owner.When I mentioned househack in my own terms I refer to the later case where we don't share space, it's like multifamily living albeit it is just living like close to the neighbour.This question is actually very good and I have been trying to debunking that myself in which neighborhood in our local that could give such advantage.

Worst case scenario, if things aren't great I can always sell and reinvest somewhere else.