I have a 1500 sq. ft. house with backyard in a nice, quiet neighborhood with friendly neighbors.
My 13-year-old lab mix is healthy but has arthritis that keeps her from doing much, maybe a 5-minute walk a day with several visits on her own to the backyard. She takes several pills a day, and likes a lot of attention. She's very sweet and sleeps most of the day.
Houseplants will need one watering, and the yard may need some watering.
I have a piano and lots of classical sheet music. Corvallis is a small university town with a lot of cultural activities (music, theater, art) and good restaurants and a small-town ambiance. Eugene is 45 minutes south and Portland is hours north. The coast is one hour from here, as are the foothills of the Cascade Mts. Lots of lovely walks in town too. .