Are you looking for a single family home, condo? You mention a manufactured home. You can get a really nice one for that price range as well in either area.
Davis, Dixon, and Vacaville are slim pickings in this price range. Would West Sacramento work? I checked the mileage and it came in right at 40.5 miles. I can definitely find you a nice home there in your price range. Please call me at 916-798-2938. I am an experienced buyers agent and I will work hard to find your the right house for the right price.