I've been working toward & on this for more than a year, still not done but thought I'd post a couple photos.
It isn't really just a orchid setup but I went to some lengths to be sure it would be suitable for them. It is a peninsula setup viewed on three sides 60X30X48" tall, 10" of water. No animals except fish as yet but will have dart frogs & a pair of small lizards.
Here is a link with a bunch more info & photos if you'd like more details. If you have any questions be happy to share.
Jim's display paludarium my first - Dendroboard
Jim