As far as "easy" Vanda species to try, I would recommend brunnea, coerulea, insignis (if you can find one), and denisoniana. Coerulea tends to be a larger plant, but the rest aren't quite as big. If you want something that will stay compact and bloom in lower light, try an Ascocentrum (I.E. A. curvifolium, A. miniatum, etc).
Make sure they stay moist, with good air circulation. You can compensate for the low humidity by spraying them with a bottle (preferably early in the day, so the water doesn't sit in the leaf axils and rot them).