I really hope I don't come off as rude when I say this but yeah, if you haven't been part of a scanlation group you don't really know how time consuming everything is. I'm currently the group owner, the main CLRDer and the main QCer. Let me tell you about what the whole thing entails...
When we first started we only had good quality scans for volume 1. We could get some other raws, but they were worse quality and harder to CLRD. We're also running very low on typesetters so, all this conbined means, we can't release more than a chapter per month.