-It's sounding like being a Buyer's Agent is not possible to do part-time because you're shuttling buyers around to different houses.

Restaurants and shuttles to the theme parks.

Think maid service during the stay (not merely after the occupant vacates), breakfast on location, laundry services, shuttle services, etc. 

The plan is to house hack by renting by the bed to airport employees who just need it a few nights a month so there are a couple requirements for the property,1) Close to the A Line or other shuttle service to the airport so tenants won't need a car (I was thinking Green Valley Ranch)2) At least 4-5 bedrooms.

That is like saying, hey look the space shuttle exploded.

Though you could probably command a pretty good premium during ski season and Telluride festival season especially if you could provide shuttle service to/from Telluride.I'm brand new to REI and if anyone would like to connect to chat about things on the Western Slope please reach out!

Found the best Airbnb right on Main Street on the free ski shuttle line. 

@Marielle Walter Also check to see if the Yale shuttle has stops near the home you are considering.

In those cities there are a lot of older (1900-1950) multifamily housing stock with good bones.I second @Brandon Vukelich's advice to follow the lightrail - traffic on i-5 is only geting worse, and Seattle's long term vision is to eliminate most buses and cars from downtown and have most of the other transit options simply shuttle folks to and from the lightrail stops. 

When I first moved in, before the economy took a dump, the condo fees included 12 hour a day shuttle service in a big loop through the city every hour 7 days a week.