Not really...30k/wk isn't that much.
Unless you have the income or business to support it, 30,000/week at CVS/drug stores is going to raise tons of red flags.
Even with income to support it, that is an obscene amount. 1.5 Mil/year at CVS is not going to go unnoticed. Even if you could ultimately show it was all meds and supplies and no gift cards, that still raises a red flag on the back end.
I'm not saying you can't pull it off, because I know people do. But I'm saying that type of volume is going to get you flagged sooner or later.