I agree with the opinions to get a water test. Sears will do one for free. I'm not a big fan of Sears as I think the quality is low.
What your looking for in the test is wether the iron can be filtered out or has to be oxidized 1st then filtered out.
If it has to be oxidized you are looking at a: 1. A chemical feed pump injecting chlorine into the well or 2. a pill dropper dropping chlorine tablets or 3. a filter with greensand or birm as the oxidizing media. Chlorine is the least expensive and lowest on going maintenance.
If it can be filtered a backwashing media filter is the lowest on going maintenance. Next option are the simple inline cartridge filters. As another opined have extra filters and o rings always on hand.