Why?
Why when you live in the weed capital of the world are you going Mexico to get a bunch of dirt weed?
Some of the best pot on the planet comes from Colorado so wouldn't it make sense for a big time drug dealer to be smuggling crap from Mexico...unless of course it was cocaine or heroin. It would have been better if they thought they were going to get weed but ended up with a ton of heroin...or at least don't have the main characters living in the easiest place to get a bunch of good weed on the Earth.
It was a funny movie but that kind of bothered me.