@Adam Zagorsky You're right, cap rate isn't going to be a great metric for 1-4 units since they're not valued based on their NOI.
Just some food for thought:
I think you're going to be in a similar boat on many properties...it's going to be a real unique property that you can get into with a low-down, Owner-Occupied loan that has the opportunity to drive enough value to pull money out while generating enough rents to cover the new, higher loan amount. I'm not saying it can't happen, just that you'll want to look at the back end as well (what will the new loan on the higher value property and a cash-out refi cost you and will the value add rents make enough to cover that amount?)
Have you talked to a lender yet? If not, I think that would be a great relationship to start building now if not. First, it'll help make sure you can qualify for the loan and amount you're aiming for. Secondly, you may find you don't need to show rental income for two years on your taxes to claim that as income towards future rentals. That's their world and obviously requirements are changing now so that may be in flux.
As for your area, yeah, I'd be careful buying over there...if you're in the Linnton area then it could be okay, but I'd be careful if you're closer to the industrial area where there are some homes. I always try to think, who is your tenant going to be based on the property and the location?
Mathew