I invested in a print press, some various shades of green ink, high quality paper, and bought a cave outside of town....so far so good!!
Alan
You need to take it a bit further (perhaps you have). Get a few hundred $1 bills from the bank. Soak in a special bleached based wash (makeup of which may be purchased directly from me for a small fee) until all the ink wears off. Then, using your laser printer and an HD quality scan of a real, crisp $100 bill, print the image on the real money paper. This way it will pass the authenticity checks when you use them at the train store. Or better yet---go to a casino and turn them into chips which you never use yet return later to cash out for other bills.
Wish I could remember which novel I read this in---pretty sure it was a Jack Reacher story...lol
---Greg