There's a ton of 'em out there - check w/Sam's for one that's pretty inexpensive and fairly user-friendly. I sell 'em - but not as cheaply as Sam's does, and what they have should do the job for you. The water waste is simply the nature of the beast, until you get into larger (and more expensive - $500 to 1k) units which will allow you to recover up to 75% of the feed water. With either one, a softener is a good idea - but with the high recovery units, a softener is absolutely necessary on water in the San Antonio/Austin area.