I think that most of the hybrids are pretty easy (at least in the GH) and they are the most neglected of all my plants. One of the best Catt people in the US is in our society. You spend a weekend repotting for him, you go home with a Ryder truck full of divisions. I'm always scared to go over to his place because I can't leave without taking some too.
If I get busy I've been known to leave them in the courtyard, toss a couple of handfuls of CHC in the pot, and forget them for a couple of weeks. When I come back, they are rooted! Semi hydro may be too wet for them, but may be fine if you air humidity is low. I grow some species like vandas, mounted or in baskets with virtually no potting mix at all. Most of the potted ones grow roots outside of the potts. Some go down through my benches in the GH, and pick up some of the cool damp air circulating there. Keep in mind that the hybrids are based on species that are often found High up in the canopy and they dry out very quickly after the rains, and the airflow is very high.
If I run out of fertilizer on my Sunday rounds they don't get any and may skip a week or two. But if I see sheaths I usually make sure they get fed.
They do seem to be magnets for scale and mealy bugs so be prepared for that.