Building a tequila brand isn't as easy as creating a craft brewing company or even a vineyard - not that either of those enterprises is easy to establish. Tequila is a particularly tricky proposition for U.S. entrepreneurs. Tequila can only be produced in certain states of Mexico, meaning tricky production and distribution issues need to be navigated in a foreign country. To build a successful brand in the U.S. usually requires millions of dollars. Austin tequila maker Scott Willis has been able...