I'd reckon Warren that the small towns/cities of Port Elliot or Victor Harbour would be nice places to consider, those or anywjere down the Fleurieu Peninsula soutrgh of Adelaide, though no real larger towns but you can have some quieter living within easy enough reach of the greater Adelaide area for work.
Going a lot further away, to south east and on southern coast line you have the country cities of Millicent and Mount Gambier and either would be good for lifestyle and cheaper living than what is usually available in capital cities or areas closer to them.