You've already taken several steps in the right direction, the next step would be to build your criteria of what you're looking for (area, condition, proximity to work/home, etc.).

It would be physically obvious.

I work part time a few days a week as a physical therapist and will be keeping that job while doing the real estate on the side.

I'm more asking about whether or not there needs to be a physical 5th unit or simply because the county assessor's website mentions 5 units, can that be used as a basis for the appraisal.

She’s also yelling same and threatening retribution and physical violence against anyone bidding at the sale.

ITs really an area that we physically go to the property to see where it is, and between my wife and I we drive in that area a dozen times a week.I believe Junius heights historic district is there (if not its a block or two away, same with Swiss avenue.)

I would agree about the location, I currently own, and live, in a duplex in the Washington Heights area and the proximity to Wauwatosa was a good buying point.

What should I look for, besides a physical walk through, clean title, and the normal property purchase math?

If the property does have an occupant you (if you win the bid) are responsible for getting physical possession of the property, Auction.com does not facilitate this nor does the seller.

I am not used to trading, as my job is more into physics.