Neo's aren't hard to grow. They're like all orchids: Too much watering and you might run into issues, too little watering and they can tolerate it better, as a lot of orchids in the Vanda group can, than most, but you can eventually run into problems.
They're not heavy sun/light Vandas, medium light is perfectly fine for most (somewhat lower light for tiger stripe types, some fukurin/shima types, and green flower types).
I have quite a few of the Neo hybrid's that the Koreans and Japanese still call Neos, and they generally can handle
roughly the same temperatures as the pure hybrids. They can't handle the cold as much as their pure Neo counterparts, but I've not subjected any of my plants to extremely cold conditions.
Bark works great for most, to give you an idea of what you could use OrchidWeb here in the US has
a mix that's 1/3 each of
- Small and medium Orchiata
- small and medium horticultural charcoal
- small and medium perlite
You can replace the perlite with pumice/lava rock to make the pot a bit heavier if you feel like you need to.
I'm going to try leca this coming spring, as while the moss mounds are neat, they're a pain in the ass to make when you have a lot of plants. I'm not doing semi-hydro, I'm just doing plain old leca in the traiditional fuukiran pots with a filter on the bottom to prevent the medium from spilling out.