Rich and Patsy's place is about as nice as it gets for an affordable whole-house AirBnB in SE Portland. It appears to have been constructed specifically to make a family of 4 as comfortable as possible. Everything was in great shape and worked well including wifi and the washer and dryer (a common source of failure in our experience). The unit is only a few easily walkable blocks from all of the restaurants and shops on SE 13th and Tacoma (including a grocery store). Sellwood Park and it's pool and playgrounds are also only a few blocks away. Basically, there is just about everything you need within 4 blocks of the unit. We had a rental car so can't speak to the ease of public transportation but I imagine buses are readily available on 13th or Tacoma that can take you to the Bybee MAX stop and the rest of the city.
If you have a family of 4 and looking for a nice, quiet place in Portland I highly recommend this unit without any hesitation.