+1 on this. Before I started keeping reef aquariums, I wanted to have an octopus tank. Obviously cuttlefish aren't octopodes, but they're similar. Once I realized that I'd have to basically get a new octopus every year, my enthusiasm left me.
In terms of husbandry, though, you will need a larger-than-expected tank and reef-quality filtration. They're sensitive to water quality and VERY messy eaters, which is not a good combo. I think for a single you'd need at least a 55g tank, probably a 90g or more if you want to keep more than one.
A little bit of searching turned up
this article from a few years back. I don't know that it reflects the current best knowledge on cuttlefish, as it's no longer a niche I keep up on. But that might give you enough to point you in the right direction.
They're cool critters and I wish you luck... I just don't have the heart to go into something knowing that whatever I keep is going to be dead within 18 months no matter what I do. =)