Hopefully the Vanda watering issue is less in the cooler weather. Phew, that's going to take a lot of spraying, and I only have 5 Vandas, too.
My mist system is part of the micro-sprinkling system I put in for the "nursery" beds in the back yard, Jim. If you haven't done any micro-irrigation you really need to go to HD or Lowe's and get somebody to show you how to do it. It's easy and fun, like playing with Lego. Also inexpensive and very efficient. You could put in one black poly supply line to your Vanda area with a timer and they'd get a nice shower a couple of times a day, or as needed.
Then when you go on a trip, you'd only need to cajole your neighbor to come and water the other orchids occasionally.
