Those of you looking for paint for projects like this Lowes and Home depot have those little testers that are 1.25 - 2.00. You can get any color you like. Even one of those tester jars of paint you could paint 10 pots at least.
If you have a Big Lots in your area they have spray paint in a couple of colors for 2.00.
When I saw this it reminded me of the paper mache pots we use to make out of glue and flour.