And I also wonder if charity can be a business as well, I mean something you can earn money for life?
A charity can be incorporated as a business, it is known as a charitable incorporated organisation or CIO, the purpose of the business is to make money for the charity. Staff who work for charities can be paid, but there must be no conflict of interest. For someone involved with the charity, either as a trustee of charity correspondent, to be taken onto the payroll, they must first clear it with the charity commission, proving no conflict of interest. If you are looking for a business venture, then be prepared to pay taxes, charitable status is not for you.