Random thoughts:
1.) Apparently the Navajo nation runs several businesses. A buyer at one of our customer's took a job with them several years ago. She called our sales rep. when she needed product and our president and the rep. flew out to AZ to meet with her and see the operation. They came back very unimpressed and nothing ever came of it.
2.) From my vantage point, the American Indian nations have a bad habit of getting ripped off when it comes to business investments with Wall Street types.
3.) The exception to #2 is when they leverage their "special status". (you know... one set of rules for them and a different set of rules for everyone else). This usually involves casino's. This doesn't fly in the world of business, where you usually have to compete on a more-or-less level playing field to convince customers to open up their wallets.
4.) The only way I can see the Navajo's making a go at this is if they try to leverage special political ideas (like the smart gun or micro-stamping) to effectively getting the government to grant them some kind of monopoly.