lol....im just bustin stones....i know (hope
) that you would give out chalk with the tray.
Another idea is,,,,,get labels for the chalk (ive seen this)....with your business name on there....so you get some advertisement when it winds up in another part of the county..
As far as the bins...they might be (spray) paintable if you cant find something suitable color wise.
I found the vending machines online running about 100$ for the dispenser.....another 50$ for the stand (optional) and 50$ for 1000 plastic capsules....+shipping.