It is a legal 3-family house-hack with $4538 in gross rents with all units rented ($3638 living in one of the units and renting a bedroom out).

Looking for local investors in the tri-cities who are in the multi-family house hacking market/game

Yes, house hack Baltimore.Determine your end goal first @Chris Hijazin.

We are not a young couple able to house hack (read 2.5 kids, 2 dogs, 20+ years of married family living) but we do have experience in rehabbing, know our area (one of us used to be a real estate agent turned software engineer loves analyzing a deal), and have a bit of cash reserves (not enough to not require financing).

Start with your goals and strengths and use that to pick a strategy...whether BRRRR, house hack, etc. 

I am looking at multi-family (2-4 units) and house hack it (owner occupied one unit).

Best first property is usually not raw land, I'd say a relatively inexpensive SFR or duplex if you aren't going to be living there or a house hack up to a 4plex is probably going to be your best starting point.

I am drawn to the idea of minimizing my housing expenses through house hacking and understand multifamily homes such as duplexes and triplexes are difficult to come by in Portland proper.

One of the first calls to action in the book The House Hacking Strategy by Craig Curelop is to find a lender.

Currently taking basic real estate classes for ore licensing and want to get into flipping or hacking.