Skagit County used to check most of those boxes with housing prices not too bad until about 2-3 years ago. But now it's hard to find stuff there for less than $350. Burlington and Mt Vernon had occasional listings for livable homes for less than $200k about 5 years ago.

It's tough. If you were wiling to consider EWA, you might like Spokane although it's tough to find homes in it's suburbs for less than $300k these days. For Spokane proper, yes but the property crime is high there.

Tri Cities or Walla Walla are also options but smaller and might fit your needs, but again they are in EWA.