Great story. Kudos.
I only have one which I bought at the same time as I acquired a Plumeria and a Clivia. All were firsts for me and so far, I have not killed any of them.
Look foward to the day when the Adenium blooms. Well the other two as well.
Given that I am in Zone 5 B and must over winter a lot indoors, I feel a sense of success that all 3 plants made it a year and look pretty good. The Adenium did though decide to drop a bunch of leves recently. Not sure why - otherwise it looks very healthy.