Please share various partnership models and what has been positive and negative, things to watch out for, avoid, put in place, etc.Thanks!

You will be eliminating a tax break that can be hugely beneficial to you as you enter retirement.You're most financially beneficial option would be to sell those properties and do 1031 exchanges into other real estate that is passive in nature. 

I plan to self manage, but it's good knowing a middle tier management option between self managed and full property management - without a huge PITA factor :)

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Going where everyone else is has its positives and negatives.

Plus, there's still so many positive cash flowing and 1% deals here in Columbus Ohio.

Pasco and Polk counties would be your best options for that.

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

If you have 80k cash, you should have many options to invest using rental financing.

There are quite a few other options that you should consider before walking away, though.It sounds like maybe a fix-and-flip loan would be a viable option for you.