Yeah, living where you do can make it tough to take car of a car no matter where it is washed. Also, to some people time is a factor.... hence the car wash.

As for the pads, you'll be waiting a long time for them to wear out. For less than $120.00 or so, you can buy the front pads and have them installed... end of those nasty dirty wheels. Unless you want to spend more $$$, the back pads are fine as is. The new pads will produce about the same amount of dust, so no real need to change the rear ones.

Good luck taking car of your car.