The cautions Grace mentions are real. However, your attention to hosing off your walls should prevent any damage. There are many other Salt Chlorine Generators available to you. Just because it is an Above Ground Pool does not mean you are limited to an ABG model. Your gallonage would justify you researching ALL SCG models in the market today.
AutoPilot Systems Inc
AquaRite (now owned by Hayward)
Chlormatic (now owned by Jandy)
Pentair Intellichlor
Zodiac
Ecomatic
Watermatic...

the list goes on and on and on....

Hope this helps.