I think I am looking for someone to do taxes and give tax advice but I am 52 with a great job and would like some advice for investing / retirement planning. 

Other than that it's all goal dependent, do you want cash flow, stack big checks, and create tax savings?

I have used the same property manager the entire hold and have had zero issues and extremely happy with management, tenant placement and help on property tax reduction.

This is as much to keep accounting and taxes easy as it is anything else.

However, I'm looking for recommendations for a tax professional/CPA in the Seattle, WA area preferably the Kent, WA area.

@Basit Siddiqi the OP just clarified their LLC is taxed as an S corp...which seems like that may be the clue for why this transaction may be taxed?

Lenders generally require you to have at least 3 months of reserves or cash that will pay for mortgage, property taxes, insurance and HOA (if applicable).Most lenders will generally lend on 1-4 units and condos.

Seems like I'll get killed with taxes if I invest outside of SDIRA.

The property is currently in an LLC that is a disregarded entity that flows to another LLC taxed as S-Corp. 

They handle payments, payoffs, and year-end tax information.