I've outlined the circles on the hem and I'm currently sewing black seed beads on. I calculated that, at one complete circle/disk a day, it'll take me 8 days to finish just the beading part. (I'm doing two tiers of eight on the front of the dress, rather than doing it all the way around, which would be sixteen cirlces!)
I decided to space the beads farther rather than closer apart. I don't want to have a lot of stress on the fabric because of the weight.... and I don't want to use lots of beads.