We recently relocated to Phoenix last summer and I'm starting to look for recommendations for local credit unions here in Phoenix which are trustworthy, low rates, personal touch, easy/simple to work with, etc. 

Usually of the home requires major repairs it may require a HML "hard money loan" then you refinance in 6 months on the new ARV.DSCR is also not a great avenue for low loan amounts because all loans under $125K will take a rate hit and the minimums are usually $125k after down payment with some going down to $100K Min.

Most rental properties in Milwaukee are old and run down, our product stands out. 

Quote from @Andrew Steffens: I am curious what products exist?

Believe it or not there are still a few "old-school" counties but those are few and far between and the volume is low.

Weigh the long-term benefits of the low mortgage rate you have versus selling and getting $500k from a sale exempt from capital gains tax.

Same experiences as above....great product with very helpful customer service and they always seem to be adding new features.

We’ve tried other platforms on the market, but the message delivery rates were very low compared to the 85%+ I get here.

However, if you intend to work with a hard money lender or utilize a short-term loan product, you're on the clock for repayment, which can be stressful if things go sideways. 

That seems low with the 5 units and storage you mentioned unless they are 1 bed units.