You are more likely to have this concern if you issue the key routinuely to tenants.

I suggest you be sure to give the good faith deposit to either an attorney or the settlement agent, never to the seller.I'm a little concerned that the seller is your neighbor. 

I am most concerned about a large area of mold that I saw on the garage ceiling.

If you're concerned, it’s a good idea to clarify with your lender or shop around for one with more lenient requirements.

I have also heard concerns about removal and tampering with these devices. - Water: I'm currently including water in rent for both of my buildings, because I've luckily not had to meter my water use.

Yes I'm concerned about the more wasteful tenants.

There are no other safety concerns or visible signs of the fire left intact.

The only item of concern is the line about a "minimum of 1-acre".

That assumes beachfront -- oceanfront, of course, doesn't have that concern (but may have others).

I put that project on the back burner since higher development costs and thin margins were already causing us concern.