Whole house water filtration-any advice?

My well is high in iron, magnesium and calcium. There is no problem with drinking it but we get orange crust on everything with it. Fortunately, we only use the untreated well water for irrigation. We use a two tank system where the first tank is the irrigation supply and gets aerated so the iron precipitates out, then it gets filtered through a pool type sand filter to another tank for the home supply. This then gets charcoal filtered and 10 micron filtered at the house. Then we have a $350 RO undersink filter, just for drinking water. This system requires a well pump, in irrigation-transfer pump and a house pump, with their associated pressure tanks. Electricity is the biggest cost, everything is on timers and controllers. The only thing I have to do is replace the 10 inch cartridge filters about three times a year. I buy them in bulk.
This system works for my water but it it may not work for anyone else.