I'm not a big fan of printing on vinyl but it's certainly an easier solution.
Keep in mind, this is not "printing" in a 4-color process type setting. I'll be using spot color foil cartridges, so based on your design I'd be using a black and sunflower yellow/imitation gold/pale orange foil on white vinyl. There are really no disadvantages, and you are assured better registration than multi-layered vinyl. I can print a test and post pics for everyone to base judgment off of.
What sizing are we talking about? That will largely determine cost, and I can do a couple different sizes if that suits everyone best...