No wonder you didn't like them, Lindsey - you were growing pandas and vandals. Both very demanding.
That's a good point though, Jeff - just as Lindsey did, you'd have to consider some sort of cold weather protection for Vandas if you grow them. But hanging on the south side of your house, my first try would be just hanging up a curtain of frost cloth for cold nights. The overhang itself will afford some cold protection, and the south side of the house, plus the ground under there will act as a heat sink, warming up in the daytime and keeping it warm there at night.
Yes, we do get some nights that dip down into the 40's even down here in paradise . . . and Vandas really don't like night temperatures below about 55. I only have a few (well, 7 or 8 is a few, right?) so I bring them indoors when the temps are slated to be cold. I also don't travel in the winter, it's really cold where my rellies live so they darned well need to come here then! So I am home to fuss over my 'chids all I want.
