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Kids are out of the houseand college is covered.

This is obviously much better than $1,400 per month.On top of that, you will now get 2x the depreciation write-off so your taxes should go down.On top of that, you will now get 2x the appreciation when real estate price go up.On top of that, your tenants are helping you pay down the loan, initially at about $100/mo for both properties, which gradually gets better and better.On top of that, you now have more units so if one or two goes vacant, you have more renters covering the losses of the vacant units.If you want to keep these properties, I would do a cash-out refi and go buy more rental real estate.

Schwab had the best rates I heard of (vs.

Duplexes for sale starting at $585,000 with a 3.75% interest rate.

What was your top 3 biggest lessons learned?

Live in one unit - It's a great strategy when using a bank for financing as the down payment and interest rates are more favorable to owner occupants.  

Pro Tip: Ask an insurance agent what your rate will be before you make that offer.

We were able to negotiate a buy down on the interest rates. 

This sudden jump in rates has not fully caught up with market cap rates yet since especially in the commercial and multifamily property markets, transactions typically take 6 months to transact, creating a lag effect between interest rates and market cap rates since interest rates adjust daily.