Also, say I’m able to obtain financing for 2 more non-owner-occupied properties.

It's just about in the middle of the most active part of SE Belmont, not right on Belmont, but on a side street, just behind the lot that has frontage space on Belmont. 

The park is currently Operating on +/- 5 acres and has 14 spaces.

I can buy a book about making a space shuttle doesn't mean I can build one.  

Apparently she and many of the other residents suspect that the management company is pocketing monthly fees that are earmarked for improvements to the complex, and has been towing condo owners' cars for nonpayment of disputed bills.She and many of the other residents in the complex are non-native English speakers and of limited means.

I'm renting a commercial space for a friend and a new day care is moving in there.

I'm looking for dense pack blown insulation for the front and rear walls, 2" closed cell foam for my basement w/ exposed joists and possibly doing the floor space between the garage and first floor (it's a 1950s airlite) and the attic. 

If you go that route make sure you get a sizable non refundable deposit and have a lawyer draw up the mortgage contract.

I'm not really excited about leaving an electric heater running unattended, nor do I think that curious, uneducated minds would think it was necessary to run one in an unoccupied space, nor would they appreciate the extra heat in summer, or the extra expense added to their electric bill.I'm wondering if anyone has tried any of these, or if they have success doing something else to help cure a damp basement.Thanks in advance.

Non of them has this type of valve installed.