The Canadians are doing this right. In the USA it is hard for pretty much anyone wanting to get into the legal marijuana business, it is hard to get loans, most have to find creative ways to have bank accounts. In Canada, that is not the case.
In the U.S., possessing and selling marijuana is a federal crime, so banks have ignored this emerging market.
In Canada, financial institutions are beginning to back corporate cannabis producers.
Read more here in the NPR article: http://www.npr.org/2015/02/11/385396403/how-canadian-banks-transformed-the-countrys-cannabis-industry