$30 is a fantastic price. I'm sure it would be higher today, but even still it might be worth it just to have it be someone else's problem. I use a cement along the inside of the seams to improve the strength and light-fastness, so I let them dry overnight before reassembling. I've got it down to about two hours of labor from unscrew to screw. Not sure about the materials, maybe $5 or so per bag, depending on what I have around.