Several people I know here are being groomed to take over family businesses, some of which are very large enterprises...and know there are alums who will be taking over multibillion dollar businesses someday. The skills that you need to run a family business are the same you need to run any business. So an MBA is actually a great investment in someone who will one day be running a decent sized business...whether they want to start it themselves, buying an existing business, or will be taking over from their parents.
I know kellogg has a family business club, I would bet there would be something similar at some of our peer schools. It might be a good resource to reach out to and get an idea of what the true value an MBA would be for someone in your situation.
https://www.kellogg.northwestern.edu/student/club/family/Family.htm _________________
Kellogg Class of 2010...still active and willing to help. However, I do not do profile reviews, don't offer predictions on chances and am far to busy to review essays, so save the energy of writing me a PM seeking help for these. If I don't respond to a PM that is not one of the previously mentioned trash can destined messages, please don't take it personally I get so many messages I have a hard to responding to most. The more interesting, compelling, or humorous you message the more likely I am to respond.