@WildBill - Check out what Man-O suggested. I have a smaller version from the same company. It just depends how much water you need to make at a time. I use the 75gpd twist in cartridge system. The small systems use 1/4" common refridgerator ice/water tubing and you can get parts at Home Depot.
This is the step down from the one MoG suggested but has a chloramine removal cartridge. You might need to look for that with your organic soil biome if they use chloramines in your water. I would price check Amazon against their own website:
Description Classic 100 GPD RO/DI unit is designed to work with tap water that has been treated with Chloramines. Unlike Chlorine, which can be removed from water with a standard activated carbon block filter, Chloramines require a special filter cartridge. The Carbon Plus filter cartridge...
aquaticlife.com
This is the small system I have from them: It makes 1 gallon of RO with 3 gallons of waste water. You can easily collect the waste water and use it in the garden. For me it takes on average 11-13 minutes per gallon depending on water pressure.
Description 75 GALLON PER DAY – The average family uses less than 50 gallons a day in water filtration needs. The Aquatic Life Reverse Osmosis Water filter has a higher capacity of 75 gallons per day giving you more clean water if needed. DEIONIZATION WATER FILTER – This 4 stage reverse osmosis...
aquaticlife.com
Their website is awful to navigate. Better systems are more efficient in terms of RO/waste/gallon.