Considering the water conditions, an iron removal system ahead of the softener is a good idea. Many companies charge whatever they can get away with, others charge a reasonable price. You can always call a couple more companies to see what they can offer you for pricing. If you want to install the system yourself, or have a feind that is capable of installing the system properly, then it can be done for much less. I may know a few reputable companies close to you, I sent you a PM.