This actually was the beginning of a fit/finish trend that I saw through mounting the bedroom doors and cabinet doors; the age has taken it's toll I suppose on these older features. 

There are obvious work done, but there is zero record, steel plates mounted on the side of concrete foundation wall, and new concrete work around that corner (That's how inspector spotted the work).Let's say the permit was not properly filed.

@Stephen JonesI am located in mount Vernon.

I'm seeing wall mounted mini splits all over in properties that are quite nice, including new construction houses built for sale.That said, central air is usually better than a multi split.

In the process though, we discovered that electric water heater can be mounted horizontally.

However in the (likely) case where your older cabinets are face-frame cabinets, you'll have to glue/screw in blocks behind the face frame to mount the hinges.

I'm a beginner real estate investor, located in Rocky Mount and I'm looking for more REIA meetings in my area to connect and build relationships with fellow investors.

I did see some clever wall mount units that are pretty slim, I think those could be a good alternative too.

They insisted on being able to install a hot tub and getting a dish mounted on the roof despite the lease not allowing them and me telling them no several times, etc.

Areas I think you should strongly consider based on your notes: oak harbor, Anacortes, Mount Vernon, Burlington, sedro wooley, Everett, Arlington, ferndaleThese areas are growing, are still affordable, and are more working class neighborhoods.