I don't know, around here anyway, I think 4 weeks is the shortest I've seen, and that's basically 8-5 M-F. Usually my comm college does it in 8 or 16 week formats. We were told the mandate was 40 hours of clinicals, so our class had 44 hours built in to allow for one class cancellation/absence if necessary. And on top of that the lecture, which we also couldn't miss more than one of and still pass the class. I don't see how we could get all that in in 4 days, 9-2. But every state is different!
My program cost $850 through my comm college. The CPR class, exam registration cost and background check were included in that, but those being included might be pretty standard.
The clinicals were really valuable, I wouldn't have wanted to skimp on those at all. On the last day of clinicals, only two people "had" to be there because the rest of us were signed off on our skills and hadn't missed a clinical yet, but every single person showed up anyway.