It is interesting to see how different people approach the problem even if its different than your own.
I think for me it bottles down differently. Simplifying life as a whole increases the value in all of your main points, family, marriage, carrier, health, and property ownership.
We have worked hard over the last 5 years or so to throw away 'junk' and collect less, all that stuff you think you 'need' isn't really a need its just cluttering your life and hindering your bigger goals.
Embracing specialization. It is better for us to work a couple hours of overtime and higher professionals to do the maintenance. This works out better for time, money, and leaves my mind free to think about the more important family, marriage, carrier and hobbies.
I work 2 jobs and wife works 3, but this allows us more time and less stress while renovating the three floors of our house over the last few years, when things like the septic system giving out in the middle of the winter for a very expensive replacement, the new shop project planed for next summer, etc..... By planning to work more and higher specialists, we have no stress, and it is done more efficiently and done right the first time, rather than all the stress of me teaching myself and screwing up once or twice to save a few dollars at 10x the time to do it.
It is counter to the culture I live in, where self reliance is valued more highly than in most of the country, but imo you have to balance that in the best use of your time and resources.
It is interesting that we have a similar 'potential' weekly hours for our hobby, and I really like that term for it, because it is so accurate. I have the same potential as you and am able to use roughly 1/2 that potential in an average week. (also recognize you have at least more than one hobby..... video production takes time you could have been building, not bad, but needs to be recognized)
With the simplification of life, I think that I can overlap many of your categories as well.
Family - Part of my hope in my hobbies is to involve my son in them, we discuss plans, he even 'helps' some, we watch videos about planes and boats on youtube, and he shares his dreams and crazy ideas. He visits the hangar where I work as my carrier, and is self motivated to 'find discrepancies' on planes the mechanics are inspecting, or to bum rides whenever he can.
Marriage - Sharing hopes and dreams, talking about projects and involving her in helping with some of the building processes. A healthy marriage includes activities together and apart.
Carrier - Easy for me, I work with experts in my hobbies. Break time is much more entertaining when discussing different aspects of building or systems than when discussing rather someone prefers a rude or weak leader of which everyone is an 'expert' because they watched their favorite biased station the night before.......
Health - Time spent building is immensely more healthy and active than the hobbies of my youth which were reading and video games.... A healthy happy hobby makes for a healthier happier person, time routinely spent doing something you enjoy is good for your health, it shouldn't be a 'job'.
Maintenance - There is always maintenance in home ownership and life, but you are only more prepared to deal with it when your hobby includes the collection of tools and resources and the understanding of different systems and the use of your hands.
Ultimately for me a hobby is something I want to do, it is what I think about, its not something I have to make time for, because when there is time, that is what I am doing. It is what I get called in for dinner from, it is what I research when reading before bed, etc.... It doesn't have to detract from all of my other responsibilities in life because I have made my life simple enough to have those voids.