Oooh, I didn't think you were, Cinta! In case somebody thought I was talking about an aquarium with fish in it, I wasn't, just throwin' more ideas out there in case somebody read that far and hadn't yet found what sounds like a workable method for their situation.
Using an aquarium as a terrarium is another great way to reach that goal of saving cuttings!
I'm also toying with the idea of keeping more stumps this year. Cuttings or 'whole plant' aren't the only way to go. On some I will cut all of the branches way back, keep most as cuttings, and excavate the stump to keep in small pots. Then instead of 6-pack size or $4-6 size individuals, I'd have a few $25 plants already in spring. The one stump I saved on impulse after realizing it was still alive after the first frost last winter was great. That would take up less room than trying to pot up big, whole plants, still yield basically the same results as well as the cuttings to multiply the overall number of plants, and stumps are OK with less sun than whole plants would be, leaving the prime spots they would need to other 'regular' house plants as usual. (I'd show a pic but a couple weeks after summer started last spring, 80's/50's, there was a frost that was one insult too many for the stump, after all. Oops!) Luckily there were still some cuttings inside...
It has cooled off enough to take cuttings, I need to get on that part!