Building or opening a business is a big risk in life also. It is one of the decision that we are choosing in life.
But if you really love what you are doing you will do every thing for it to work. And i love your ideas. You can also try to print in on mugs for souvenirs.
Risk will always be there but if you have love and passion of doing this, will simply erase that thing.
A lot if people become successful with business because they really working on it and have a complete strategies. A right choice of business and considering the demand of the public will help to make it succeed.