The comps concern me as you are probably buying at or a bit above market value, but $400 / mo cashflow for a triplex is nice in this market and is hard to come by. 

This would be great but would likely mean not buying as nice of a house for ourselves and definitely leaving SF.

The only reason I am hung up on this property is because the interior is very nice, and the location is quite convenient (right across the street from the medical district which is the heart and soul of my community).

These people typically look for retirement housing that allows them to visit mom and dad in nearby care facilities, and they're also worried about aging in place themselves because they have firsthand experience with the problems of noncompliant housing.As far as I can tell, astonishingly, no one else is doing this in rentals in Pittsburgh, despite the obvious demographics. 

Perhaps a nice 1950's built bungalow.Always hire a 3rd party property inspector to give you an unbiased feel for the home.

Try visiting a few mobile home parks you're interested in.

Most newbies that have herd mentality are buying those now.If you are trying to get safer investments you might want to buy brand new builds in a subdivision in a nice area stage 0 to 1 of development.Example you look at 2 options:Option 1 - Buy a house for 75k (Class C) that after mortgage payment is supposed to generate 150 a month income or 1,800 a year.Down payment 15,000    Result: In a few years rent growth in lower income areas is more limited due to income earnings.

I had the same revelation as Justin about 6 months ago during a trip back home to visit my sister, who is based in Denver.  

What I haven't figured out how to do is get it to return a search query to give me an easy list to look at of what days I've visited them which I think would be immensely helpful.

I visited the manufacturer and they mentioned the benefits of going prefab is the costs you save from on site labor and the schedule.