The formal description is that I’m a consultant to business families (families who have a business together, or several, or just manage their money together). My job is to have (or help them quickly find) answers for how to address any challenge, problem, opportunity, or new dynamic they encounter. To keep the family happy, the business humming, and the wealth growing. I’m a combination between their pediatrician and their priest… I’m the first call they make, but I’ll often loop in other professionals to get the best result.
It’s easier than it seems, and immensely rewarding. Families only fight when they run out of better options. So the moment they have faith that I’ll help them find solutions, the fighting just… stops. And then they focus on what they have in common, and how to do more fun things together. And if I do my job well, they keep me around. 
I believe “follow your passions” is terrible advice. What I teach all our clients (trust me, you are NOT alone in all this) is to answer these questions in detail, and in order:
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What are you especially good at? Where are your natural strengths compared to the general population? What comes easily to you that most people struggle to achieve? Anything you do will always be a ton of work, so matching “a ton of work” with “your natural strengths” should be the starting point.
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Within the set of things you are excellent at doing, which are the ones you like best? Don’t pick just one, keep it to a relatively short list.
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And within that list, which ones pay at the level you want?
Note that I’m talking about skills and strengths, like learner, teacher, problem-solver, communicator, leader. I’m a terrible “operator” (can’t run a business, or organize my sock drawer) but I’m a great “teacher”, so consulting fits me well. My son lists his strengths as persistence, analysis, integration of different disciplines, debate, argument: therefore, he’s looking at possibilities as a lawyer, consultant, or engineer, wherever he can BOTH leverage his greatest strengths and also have a great time.
Also note that some part of your income might ideally come from a “gig” or entrepreneurial venture, not just a “job”. You might find that some freelance work would fit your needs beautifully. Or there are positions that fit well next to a job: as an Independent Director on some other company’s Board, for example. Those roles pay well if you add value, they don’t take much time, and since they add to your learning and reputation your “job” may be OK with you moonlighting openly.
Lots more to discuss, but really take some time to work through all of this and find a place where you are happier. The French have a saying I love: “la vie est trop courte pour du mauvais vin” (life is too short to drink bad wine).
The world has been changing the last few decades. You are likely to work until you are older. You are likely to need to change what you do over time. So, try to do it all how, and when, it is to your advantage and adds to your sense of joy, fulfillment, and satisfaction that you have truly added value. There is always a way.
Edit: a really useful book to help you think differently and start this process is Now, Discover Your Strengths.