This is common in the Chicago market.

They suggest relying on the inspection contingency instead.Is this a common practice right now, or is it specific to my area?

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.

. *** 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. 

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.

If so, what is a common percentage range?

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.