An association may be organized only for the purpose of rendering the one specific kind of professional service its associates are authorized to render, and it shall not engage in any business other than rendering the professional service for which it was organized. The professional services shall be rendered subject to rules and regulations of the professional licensing boards with particular reference to manner of practice, number of locations of practice and professional conduct as well as any other matter which may properly come within the jurisdiction of the professional licensing boards. However, it may invest its funds in real estate, mortgages, shares, bonds or any other type of investment, and it may own real and personal property necessary or appropriate for rendering its professional service.