Depending on the cost of the blanks, might be cheaper to than the money I burn on fireworks every New Years. 
Thanks for the reply everyone!
It's $2500. Not cheap for a toy, but who cares. A real Thompson is minimum $25,000 now, so with this you get the fun part for 1/10th the price, and it's great display piece that you can actually use and have fun with then. The craftsmanship of it is also spot on with the real ones, so that's pretty dang cool.
The guy makes the proprietary ammo for this himself. Mass produces it and sells it for $0.50/round. Again, not cheap, but not bad too. I can just fly with the ammo over here, so that's no big deal, I'm seriously tempted. I could go out and do mag dumps with my friends all in good fun.
Very glad to hear this is legal here!