After going to the Clivia Society show and taking lots of photos, I asked a society representative about growing Clivias. He made it sound fairly doable, so I went to Longwood's gift shop where Clivia plants are sold. To my amazement, the cheapest Clivia plants were $299.00, so I decided I would just continue to visit the Clivia plants which are all over Longwood's Conservatory and not try to grow them myself.
It would be interesting to know why they are so expensive!