I have to disagree there are different levels of hobbyist without being someone doing this for a living.Either its a hobby you might make a buck off or its a business.
It can be a hobby and make a lot more than a few bucks.
I make a profit (more than a few bucks, even more than a few thousands) but this is a hobby, I do not rely on it to pay bills and do not wish to make a living out of it.
So the question for the OP is what kind of profit are you looking to make? Do you want to make a living out of this?
If so you will need to treat it like a business and have a solid business plan and meaningful initial investment.