Hi Andy & Yvonne
Looks like Frankston is not the best place to settle

!!!!!!!!!!!! The houses are so much cheaper there, so that speaks for itself I think !
Like Lesley suggests try Frankston South, Mornington or Mount Martha................ a bit further out but well worth it, for peice of mind and safety.
Try this link too, it tells you more :
Mornington information & attractions - Travel Victoria: accommodation & visitor guide
Good luck