Definitely a unique position to be in. 

If it's just speculation, start by reviewing the law to see if there are any unique requirements for a business.

Your record of this deposit (via teller slip or online transfer) will be your receipt of payment.This elimates complextity and the additional steps/rules that come with using a third party to collect rent.I get an email alert when a tenant makes a deposit, and each rent amount is unique so I know who has paid in case they don't have the teller add a memo to the payment.They can transfer funds online, or walk in to a local branch with cash, personal check, wampum, etc. 

That said, long-term the appreciation you get in the Puget Sound region is superior to many other markets, so assuming you find an excellent property management company that is able to screen tenants and only put in very well qualified, vetted occupants and you experience limited issues over the holding period, you'd likely come out ahead retaining the Mill Creek property if your financially able to do so and still buy wherever you are headed out of state.

Make your furnished unit unique and market it everywhere.

While DSCR loans tend to have interest rates a bit higher (generally 0.75% to 1%) than the other two options, which can challenge cash flow, this comes with some advantages that are uniquely suited to the BRRRR method.

I do know that some regions of the US are really popular on the BiggerPockets forum for rental investments, and Columbus seems to be one of them.

These are barrels that store owners/managers/customers work with distilleries on to hand select a unique barrel that is bottled exclusively for their establishment.

This will give you the opportunity to see how each of the disciplines are unique and different, and profitable for the time invested, and allow you the chance to decide which segment to become an expert in.

Unique home, tiny home, full renovation to bring luxury to the tiny home community, location (king st alexandria).