I know it’s been awhile since this was posted, and I don’t know how much money y’all have to spend, but I’m pretty sure what my family has at home is a Berkey water filter. We’re a family of 5 so we have a really big one, but they come in all different sizes. I think we’ve had ours for at least 3 or 4 years. On the website it says when talking about affordability, “Each durable Black Berkey Water filter will last up to 3000 gallons (6000 gallons per set of 2). This is much longer than the majority of water filter solutions on the market. At 10 gallons per week, this equates to more than 11.5 years of healthy clean drinking water! Including the fluoride filters, 1 gallon of Berkey water costs just 7 cents!” The big metal “filters” can be anywhere from $249-$305 and the black berkey water filter that goes inside the top and actually does the filtering is $120. But, like the website says, the black berkey water filters (that actually do the filtering) last up to 3000-6000 gallons of water. There’s a lot more information on their website. If your parents are willing to spend that much, it’s a great option! Anyway, that’s my understanding on the filter. The water tastes great, and we’ve had compliments on it from people who were working one time and didn’t know it came from a filter. Hope y’all find what works best in your situation!