Just my 2 cents (not meant to be an 'answer' at all...).

If you're passionate about business & entrepreneurship I'd say you'd be the perfect person to take your parents' business to the next level. Look at what Gary Vaynerchuk did with his parents' wine business...

Are your parents both taking full time salaries? Are they willing to transition out of the business to allow for increased salary expenses?

Also, if you have any ambitions to become wealthy DON'T give away share options/ownership of the company unless you absolutely have to. I'd suggest working for nothing if it meant you could retain ownership and survive off your ramen profitable start up...