Add on to that house. You may have many reasons for wanting to stay where you are, from the kids are in a great school, to you only live 5 miles from work, to you home has a great view. So add on to that home; if you don’t want to expand horizontally, you can add a floor and go up instead. We have done both for clients. Here are a few photos.
Here is a photo after completion:
So consider an addition, with a bathroom, when you find yourself having to wait 30 minutes to get into your bathroom!