I have lived in Tennessee and we use salt on our roads out there, and brought a 95 camaro back from there with salt corrosion, sand blasted the areas that were bad, gave it some amazing washes, then some good paint and never had an issue till I sold it a few months ago to get my wrx.
had the car for 6 years after I bought it.
so just depends on how well you take care of the car and the areas you see the rust and you will be good as gold.
now as far as the maintenance, seems to me like normal maintenance for 60K
besides the axel leak
2011 WRX Premium