--Upside: cheapest option, would be pretty fun to make. Plus, it's hilarious.
--Downside: would probably fall apart.
--Upside: would be AWESOME. Mad science for the win!
--Downside: very difficult to pull off, and relatively few people would get it.
--Upside: Gives me an excuse to buy a red fedora and trench coat.
--Downside: Fedoras and trench coats generally cost money.
--Upside: would be hilarious if people got it.
--Downside: no idea if people would get it.