I suppose it depends on budget... I've seen people dump tons of cash on reclaim just to see it not work. And I've seen people put in just a little cash just to see it not work
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Bottom line is the more storage you have, the better off you are. So, if tearing up half of the lot and putting in underground tanks all over is within budget and there is a calculated payback, it can make sense. Since there is self service bays, I would use the reclaim for the weep there - that does save a whole lot if you are in a cold area... And its fun to watch people thinking they are cheating while washing their car with muck water.