Water Filtration System Needed

I have just purchased a cabin in SE West Virginia and it has no water filter system. I have had the water tested and specs are 3.4 ppm total iron, .6 ferric iron, 2.8 ferrous iron, 1.1 ppm sulphur, .1 manganese and a hardness of 7. I have had an estimate for equipment to fix this problem with installation to total $5705.00. This in way to high and the explanation I was given was that I needed all this equipment to solve the problem. I think this is overkill but I would appreciate any knowledgable help. Equipment told that I needed was as follows. B&B MarkV Dry pellet chlorinator installed on the well to kill bacteria. Ecowater ETF2100 to remove the chlorine, iron and sulphur. Ecowater ECR3500 to remove trace iron hardness and manganese and then Ecowater ERO375 for reverse osmosis to make water drinkable and to cook with. This is my first time on a well system. I have always had city water before and now the water is turning everything orange. This system is going to be used at a cabin in the summer months only and will have to be drained for the winter. Any help greatly appreciated.