Common mistakes can cost thousands.

@Alec Jacobs, If the electric dryer is on one units service the washing machine is as well.I'm assuming these are located in a commonly accessible location such as a shared basement.

Smoking weed, sure.Just use common sense.

. *** What loan structure and fees do you all commonly lock down and what would you recommend in my situation?

I think you crossed 2 of the more common real estate tax benifits.Section 121: Primary Residence Capital Gains Tax Exclusion What it is: Excludes up to $250,000 ($500,000 if married) of capital gains when selling your primary home. 

Thus, bringing the borrower’s principal and interest at $1,949.63.Net Cash Flow for this may equal $808.66, with a 14.12% Cash-on-Cash Return.In this scenario, the borrower is looking for $68,746.00 to fund the Entry Fee.

@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?