Quote from @Brett Deas: I personally don't like using furnished finders accessory systems as they have big holes in them, but one thing I have learned is they are a travel medical professional you can ask to see their contract.

@Trevor Ramos an extremely important thing to understand on the front end is the difference between a Mother-In-Law (MIL) and Accessory Dwelling Unit (ADU) in the eyes of the city of Seattle (as well as surrounding cities like Des Moines) .

Besides this option, are you also open for a house hack (finish of a basement, Accessory dwell unit, mother-in-law, .....)If you are open for the two options, you will have more houses to choose from.Always open to more conversation over phone or coffee if that's helpful!

The one below (not mine) has been pimped with accessory sliding tracks, and you can see a router under the right table, which comes all set up for a router.I use a TS all the time in renovation, ripping boards and moldings to custom sizes trying to match existing woodwork or reframing doors etc.

@Darren Chang I just skimmed the code and It looks like there is an owner occupancy requirement for accessory dwelling units (as you mentioned you could in theory live in either).

If not, maybe target one with an in law/ accessory apartment (for the income)...Boom you are landlord... 

The link to the requirement is here http://www.seattle.gov/sdci/permits/common-projects/accessory-dwelling-unitsDo you know any other cities in the greater Seattle area with similar regulations.

I made sure the buyer knew about this.In the town I live in they allow accessory units restricted to family member use in some zones.