Let me close this chapter with another round of lessons.I’ve already mentioned one social media blunder that hit me right in the face: not being consistent.

Like mentioned already you're in a good market.

The irony is most investors who form LLC's do not operate them correctly, fail to obtain appropriate types or amounts of insurance coverage, fail to understand their coverage exclusions, take short cuts and don't obtain permits, use unlicensed and uninsured vendors,  fail to execute contracts with same vendors, don't understand the mechanism of additional insured status, indemnification etc. and are actually more prone to claims and conflict with their LLC than the individual who does not own real estate in an LLC but understands these tools I mentioned.

As others have mentioned, the note-investing industry is too small to support numerous listing sites that can be profitable from simply transaction-based revenue.

Not to mention that all their ROI calcs depend on cash flow of course so long term return calculations also fall apart. 

As mentioned above check your local laws regarding STR, occupancy, building code etc.If good on the above, then figure out your cost. 

The area and price range you mention  should go  very  quickly regardless of the time you list the property... when you sell - you can also ask the buyer to provide you with an extended closing date or lease back ( if you need some extra time before needing to move ) . 

I looked at that quadplex you mentioned and I couldn't get that 3,000 mortgage without a 30% down payment.

I'd also look at landlord tenancy laws for WA as I think they are pretty tenant friendly and getting rid of a bad tenant (even one who doesn't pay rent) may be hard.You mentioned you'd profit $130K if you sold it. 

Not to mention the laws they be changing..