His dream was to be an airline pilot, so he took General Studies in college and Air Force ROTC.  

You can site the entry reason as a abandonment, inspection, change air filters, etc. 

Even 2-4 units and employing an aggressive air bnb strategy, produces very tight numbers.

. ;) I had the chance to go to Anchorage, AK while in the Air Force Reserve and it is beautiful.

I would do this by scheduling them at the same time or close enough to cross paths with a potential tenant that they it might apply some psychological pressure that there is a lot of interest and at the very least as Mike stated, it does allow another person to see it and talk about the property.

Most of the investors that I know who have purchased multi-unit buildings convert the units into forced air (furance) where each apartment has its own furnace, hot water tank, and central air unit.

A well pump system also has a pressure tank (usually in the basement) which has pressure reliefs and cut off's that can fail.

If the old water and sewer lines are old and low water pressure and you have to dig up the parking lot to replace to the main at that street that alone could be 100k depending on the length of the run.

Over time the pipes become damaged as voids or underground air and water pockets form and either the house or the pipes subside, cracking the pipes.

It is guaranteed to give you sleepless nights and grey hair from time to time 6) Peer Pressure - or lack therof.