@Ed Morrison - Welcome to BP! Congrats on getting the BRRRR book and diving in. We (The David Greene Team) are in your neck of the woods. We hold meetups all the time and would love for you to check em out.
As far as OOS investing, if cash flow is your main goal there are a ton of opportunities out there in not only those sates that you mentioned, but a plethora of other areas as well. You will get cash flow and if you factor in property management with you numbers, can be rather hands-off.
One thing you won't get in the OOS markets is appreciation like you do here in the Bay Area. Refinancing your home is a big step, and if you are going to do that, I would want to make sure it's worth my while and put the refinanced capital into an appreciating asset that you would eventually be able to refinance, and rinse and repeat.
There are a ton of different strategies out there and if straightforward cash flow on an "affordable" property is it, I would look into Kansas City. Even though the secret is out so to speak there, you still can find "cheap" properties that cash flow.
Good luck and let us know how it goes!