Friends of us just found / rented a lovely place with garden in Möhlin (Aargau) , Close to the border, Close to Kaiseraugst and Town plants of Roche yet outside of town.
Close to the border for shoping ( Rheinfelden) and a trains to Basel too.
Other places within 15/25 minutes train/car from Basel/Kaisersaugst are :
* Mumpf
* Stein-Säckingen
* Eiken
* and last but not least Frick.
All these are on a direct connection train line to Basel , or directly accessible with the car.
Regarding buying a house, thats a personal choise and involves a good bit of research and work.
Check out the Forum search for more info, here is one to help you on the way :
[Ins and Outs] Buying Property in Switzerland
Be quick as houses with gardens here are rare to find for a reasonable price yet when you do, its lovely !
Happy Househunting
Joey