Albert Ayler is certainly not everybody's thing, nor does he need to be. I'm glad you took a look and I hope you at least understood what I meant about how much comes from simple sounds being well modulated. In the end, these are just oscillators, samples, and drum machines like any other electronic instruments - it's the workflow and design for each voice that makes it.
I do understand how the Tukra works, but the fact that it's a sound source makes it more of a liability in the small rack you posted (unless you just ditch the other oscillators entirely until the case expands). In a bigger setup this changes, and it's not a bad start at all if it's what you really want, but when you've only got a bit of stuff at the beginning it won't be as much of a team player as it could be if there's also oscillators to manage (though the Doepfer mino synth does make a cool modulation hub if you abuse it like modular is meant to be abused). A modular drum machine setup focused solely on facilitating and manipulating the Tukra would be a great start and could probably get that first hour of music going pretty soon.
I'm not engaging with your concept because it's too theoretical. It's not that a big system like this is bad, but no one can know what it needs to be at this stage when you haven't yet explored what it is and what it accomplishes. Spend a month with something like that Taiga on its own and you'll find it can fill out entire tracks on its own. You'll probably get your 60+ hours of music a lot easier from thinking in terms of one thing at a time, spending time with each stage of your modular setup and using the little nooks and crannies in it to fuel your inspiration rather. If you somehow got rich and just got it all at once and had to sit with all the possibilities and decide where to start, I doubt it would be as productive. Your concept, aside from the idea of a big system, which is good but best done gradually and through trial and error, seems to just be "what if I could get the analysis paralysis of a DAW in physical hardware?" Staying focused is the only way to keep modular from being an expensive chore rather than good, useful fun.