I'm baking a cake around twelve inches tall( and 8 inches wide in diameter), but I need help on the fondant part. I'm not sure how to cover a cake this tall with fondant, and I don't think I'm equip t enough to roll it out that big.

The reason I'm making it this tall, and the reason why I can't use buttercream, is because I'm painting a long design on the side .

Can you guys thing of anything else that would work? :/