These pavers are the only ones we could find for sale on the internet. They look nice; I might buy them for myself when it's time to replace my driveway. But the owner is concerned about high heels getting stuck in the spaces. And let's compare prices:
By comparison, an above-ground corrugated steel tank, with the pump and controls necessary to integrate with an irrigation system can be found on the internet for an average of. . . $1.12/ square foot.
A below-ground steel tank, costs a little more than above-ground, and installation is more. Maybe $3/gallon, installed.
Sure, there's a cost for the space for an above-ground tank. And if you don't already have an irrigation system, you'll need to add that cost. And Home Depot doesn't always have the lowest prices when buying large quantities. But still, $125 vs. $1.12 or $3???
UPDATE: Received some immediate feedback on this blog entry. Pervious pavers on commercial jobs are available for $8 - 18/square foot. Still, rainwater harvesting is much, much less expensive.