Pursuing a JD/MBA to start a business doesn't make sense. It indicates a risk-adverse personality, somewhat anithetical to the traits of an entrepreneur. It probably only makes sense if you generally enjoy the subject matter of both, otherwise the real world rewards ut experience than education, especially since you're likely to only use 10% of the education 5 years out.
I said it would probably make starting your own business easier--implying you have the knowledge of the legal ramifications, restrictions, and requirements to operate as well as knowhing about business itself. Folks who start businesses usually end up seeking some sort of legal advice or service at some point--get my point?
And to further the argument, I think you are assuming starting your own business as the first thing out of school. All I meant was at some point in your career, if you decided to pursue your own firm or business venture, whether by yourself, or with others, it would be beneficial to house the knowledge of both degrees and experience.