You have an open door that will set you up for life. And for a lot less effort than basically anything else you can do. Use this opportunity as a springboard to

You have an open door that will set you up for life. And for a lot less effort than basically anything else you can do. Use this opportunity as a springboard to get to your dreams. In 5-10 years once you have a family, you'll probably appreciate the stability FamBiz offers. Now, I'm not saying throw away your dream for money. You'll resent the golden handcuffs if you do. I'm saying that you should figure out how to make them work in tandem. Granted you may never work at Google if you become CEO of FamBiz, but there is no reason you can't get your PhD then run FamBiz while pursuing your interests on the side. Think of it like being Elon Musk at a smaller scale. He has (and still does) run enormously profitable businesses and still spends time and money on things he is interested in. tl;dr - you are being offered a stable and lucrative foundation from which to live your life. I'd say go for it and use it to fund your dreams.