Good idea; a less expensive interim solution (especially considering the additional water cost) is Cottonelle Fresh Flushable Moist Wipes and similar wet wipes.
Don't try flushing many at once though or you'll have a (w)hole new problem.
Apparently some aqua-aware societies consider people who only dry wipe as heathens. After all, they contend, you wouldn't consider your hands clean if you only blotted them and didn't wash them.
To quote Bugs Bunny: "A-bidet-a-bidet-a-bidet, that's all, folks!"