You could look into setting up some type of tent or canopy that would shade the vehicle you are working on. I think they run anywhere from $100 on up. Make sure to find some way to secure it to the ground so that a gust of wind can't pick it up and damage the vehicle you're working on.
I've been pondering this myself so that I can do work in the sun/rain. I was also looking for a place that might rent out bays or garages so that I can take a vehicle there and work on it. Haven't found one yet but as long as they had h2o and electricity hook ups it should be g2g.
Sent from my SGH-T959 using Tapatalk 2