I literally picked this one because it was all I could afford and didn't have significant damage.

Any reason for picking one type or institution over another?

I'm definitely curios where it is because the OZ in downtown are mostly in some pretty "rougher" areas except some small pockets so it sounds like you could've picked up a gem.If it were me I'd look at what the zoning permits, and then I'd talk to someone at the zoning office to see what the rezoning process would look like and then potentially what could be built there.

Photos seem fine to me - I don't think someone would look at the pictures and be turned off.You could add a bit more to the description as I find that can help entice people by painting a picture of the neighbourhood, how it is to live in the unit, closeby locations/hot spots.This is the worst time of the year for rentals, I'm sure in January interest will pick up.

each unit is around 450 sq. ft no washer and dryer and in a older c-class neighborhood.

Investment Info:

Small multi-family (2-4 units) buy & hold investment in Robbinsdale.

Purchase price: $212,000

Cash invested: $26,000

House Hack Duplex. 3 bedroom 1 bath/ 1 bedroom 1 bath

...

Often, these are homes bought in declining areas / lower middle class income areas. 

Soak up as much as you can about the field you are choosing to learn and only focus on that one thing, also find some people that actually wholesale either around you or on BP and pick their brain and if you get lucky someone to partner with to show you the ropes.

Has anyone ever picked up and moved across country to an unfamiliar area using your bank's lender and a found Broker?

A new Amazon shipping center backing up to your middle class residential neighborhood would probably hurt your value.