You CAN have one--think outside the box.
Check with a carpet store to see if they have any empty tubes that the rolls come on. Cheaper (I think) than PVC pipe would be cardboard 'forms' for concrete footers. If anyone has an old pet carrier, it could be covered inside and out.
A utility company wire spool would make a great base.
Plastic totes with one or two openings cut in could be fun.
Instead of 'rassling' carpet, wind rope or twine around the tube shapes.
C'mon folks. Yours doesn't have to look like the commercial ones--yours can be BETTER!