I'll do an occasional SFR deal for when it makes sense, as someone once mentioned "it's like picking money up on the side of the road", but will primarily stay focused on MF. 

Off the MLS (REOs, Short Sales and the occasional private seller);2.

Next, from what you said, it's my belief that you're already on the right track.Ann Bellamy pretty much shares my view - I have experienced that it's best to pretty much never sell anything, although there are a few properties that after years, just didn't fit the long term plan, so an occasional sale maaaaaaaaaaay be ok.Next, she said "buy more properties faster."

We do expect occasional problems like kids failing out, etc.

My parents live in Stockbridge so I come down occasionally which is why I'm familiar.

The deal flow has been quite a bit less, but you can still find the occasional three or four unit that makes sense to house hack. 

The agency that does Section 8 in my area said it happens "occasionally." 

Which we do occasionally. 

I have lunch with them occasionally and I always ask them if they can both quit their jobs and retire after five years of investing in multi-family apartments with lifestyles.  

I've been able to figure out how to manage remotely with occasional visits.