From what I hear they grow great in terrariums. I'll have to try it. How large do they get ?
That is what I got them for...
I'm not sure about the Sarcoglottis, some can get quite big (have a few more than a foot across). That one is a new species to me. The others are pretty manageable. Ludisias are ramblers and can make good specimen plants, but you can keep them in check. They all would fit well in a terrarium.
I've seen them growing in the wild on decaying logs, so "soil" is not needed. Decaying logs offer good supply of moisture and proper drainage. Point is: S/H should work.
I will try to grow it in S/H. It will be my first orchid in S/H. By the way, are you sure that the first photo is Anoectochilus roxburghii? I thought all Anoectochilus roxburghii should have wide silver line at the middle of the leave.