Just for comparison to another one-man-operation:

I've done business with southwest frameworks several times for frame painting and welding.
Phone and emails are always returned, and I have never waited more than about 2 days.

You all who put up with the bad treatment are just enabling that behavior. You should send
the guy a clear message saying you don't appreciate him treating you like this, and that you
are not going to bother him with paying work.