Arizona gardeners don't grow many orchids outside during the summer. I'm going to try and expand the knowledge, but it's not going to be Masdevallia, Pleurothallis, Phalaenopsis, nor Cattleya.
Have you considered getting something like a Rubbermaid stock tank for your growing area, and putting collected rain in there? You could water your orchids with it.
__________________ May the bridges I've burned light my way.