I have an idea about location on the coast if that's what's desired -

http://oregonwriterscolony.org

It's a house for rent by the Oregon Writers Colony. You have to be a member to use the house. $40/year and then the house is just $20/night for each person, I think.

Portland might be easier to get to in the autumn and winter, though. Sometimes crossing the Coast Mountains is tricky during winter.