$200k US
Commute is by light rail, heavy (commuter rail) or bus. Depends on where you are. Construction on light rail from downtown Seattle to the airport is under way. Commuter rail runs all the way to Tacoma. Busses run all over. Funny thing is, it's faster to take a bus from Tacoma to Seattle than it is to ride the heavy rail from Tacoma to Seattle. However, both are convenient. Light rail will eventually reach Tacoma, but the trip will probably take an hour or more. Please visit SoundTransit for more information.
Also, consider north of Seattle, Everett or Marysville, but be prepared for a 60-90 minute cluster each way. I say Everett and Marysville, because anything south of that is generally $300k + territory.
Portland has a light rail system larger than Seattle's that takes you right in to Downtown, out to the airport and I believe they are constructing a north-south line as well. They also have a streetcar that's very popular and convenient and a spectacular tram that takes you up to a medical institution (not sure of the name). Portland is also extremely bike-friendly. I've also never experienced freeway congestion in Portland that I couldn't tolerate. Overall, a great City with a great walk-able Downtown.
Oregon: No sales tax, but a state income tax.
Washington: Sales tax (by county, mine 8.8%), but no state income tax.
Both Portland and Seattle can be considered Liberal.
Gangsters, crackheads, meth addicts, and runaways proliferate in both Cities.
If it must be Seattle, I believe you can find a $200k condo within walking distance or a 5-minute drive away to a free (yes, free), and secure parking garage, where you can then board the train into Seattle. I still think you'll be okay, even more so if your starting salary is $75k.
Still, consider Portland and Eugene and Corvallis - all great places, the entire Willamette Valley is beautiful