For watering in a greenhouse, the Mist-King system is really not adequate.
Look at some of the micro watering heads available at “The Drip Store”. Stuff they sell, plus pvc pipe and a pump, and you’ll have a far more appropriate solution.
Sounds to me like you need to brainstorm awhile before purchasing anything. I was originally just answering your MistKing query. Kudos to Shady and Bill for going further than the original question.
Mistking
Looking for a misting system? Look no further. Automated misting systems from MistKing are used by multitude of plant enthusiasts and are perfect for Orchids. Systems feature run dry pumps, ZipDrip valve, adjustable black nozzles, per second control! Automatically mist one growing shelf or a greenhouse full of Orchids.