I’d love to hear about your goals and what you’re hoping to achieve here.

Perhaps an installment sale will also achieve what you want if you can keep their income below a rate thrshold. if they are sensitive to capital gains, then think through options where you can get it stepped up. 

However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

You can still achieve it, but finding deals that actually pencil out on all criteria (low enough purchase price, low enough renovation cost, cash flows on the backend, all cash out at refinance) is pretty hard.

Congratulations on your impressive success since 2021—that's quite an achievement to have closed over 100 transactions in such a short time.

An idle brain/body just begins to get worse if you stop using them.

I think it's the best market in the whole country in my opinion.

It sounds like you're on the right path to achieve the goal of 20 rentals. 

McKinney and Princeton have been growing a lot and it is a good place to invest, but it is always related to what you are looking to achieve in a rental investment, appreciation or cash flow.At this time that area does not offer a big cash flow and due to the amount of development going on there, rental demand has declined a bit.In any case you have to make an analysis case by case.

I have no doubt you’ll continue to achieve great success in your investment journey.