I agree with Steve - what a great thing to do for your Mom! I think our laid back lifestyle here on the coast would be great for both of you.
I'm in Astoria. We've been rated one of the country's best small cities to retire in. We have a great local hospital and our medical community is growing rapidly to accomodate an aging population.
columbiamemorial.org We have a vibrant arts scene, great independent restaurants, we're minutes from some of the most fabulous beaches. Another great resource is oldoregon.com, the site of the Astoria-Warrenton Chamber of Commerce.
Our rental market is tight and I often refer clients to craigslist or the local paper, dailyastorian.com. If you're in the market to buy, you can buy a smaller home for $200k. I'm a local realtor, so feel free to email me if you'd like answers to your more specific housing questions.
I have two elementary aged children and we love the schools. Both of my kids are well challenged and the warm, caring environment really encourages a sense of community. We love it here!