Here is a link from the Seattle Cancer Care Alliance website regarding lodging and transportation.
http://www.seattlecca.org/scca-housi...sportation.cfm
Long term (2 weeks to a month+) housing starts at about $800.00 a month and goes up from there. They do have many options and many of the hotels offer special rates to those receiving cancer treatment. My secretary's daughter works at SCCA and I have a lifelong friend that works at Fred Hutchinson. I'm sure they must have special programs for people seeking treatment. Let me know if I can be of any help.