All kinds of issues...electrical outlets ungrounded, plumbing issues, flooring issues, a deck that was built wrong, a new master bath that didn't make any sense with a shower door hung wrong, a shower pan that had been nailed through, roof repairs made with 3/8" plywood, roof leak "fixed" by caulking the shingles.....new vent boot that wasn't nailed or seal, bath fan this venting into the ceiling....an unreal list.  

You could easily get all lower end SS appliances at you local Sears Outlet for around $1500 to $2000 (fridge, dishwasher,stove) The counter space is small.  

I was wondering what some of the unexpected or overlooked expenses in owning a mobile home park, assuming that all of the homes are resident owned.  

So any unexpected occurrence starts a domino effect with other expenses.

Are there electrical outlets in the walls in question?

The chinese drywall is so toxic it will actually change the color of the outlet covers to an off white.

Any unexpected insights?

Disclaimer: This is based on adding a door in a single-family home in Missouri; the requirements for multi-family and in other jurisdictions are probably different.If you have any electrical outlet boxes in the fire-rated wall, they probably need to be steel, or the fancier plastic ones... the cheap blue ones aren't rated for it.If you have to bring a pipe through the fire wall, there may be some requirements about that.  

Replacing a roof can definitely break the bank if it's unexpected.

If you don't mind, give me a call at the office and I'd be happy to help you get started here, help you achieve your goals and refer outlets for education and networking and other professionals.