If you turned around and looked the other way, you would be in Cactusville.
My Eulophia petersii lives with the cactus. Both Tarev and my plant are years from blooming but its fun to have an orchid that acts like a cactus, especially when I grow both.
The most important thing to remember when transitioning orchids to water culture is keep them clean. Change the water often and cut off any dead roots fast. You get rootless orchids from people who have no clue how to take care of them. I rescue them, reroot and/or rehabilitate, get them to blooming again and sell them - this is an ongoing project as a fund raiser for my Orchid Society. We sold 6 or 7 of them at our annual Show and Sale a couple weeks ago for $15 - $20 each. We call them the "Second Chance" orchids. I also have an Oncidium just starting to bloom going to the Club meeting in a couple weeks (and hopefully 5 more Phals). I never repot them unless the roots are gone. There are a couple of us "gleaners" and "sitters" in the Club.
