First - to be clear - any workflow that works for you is great. And perhaps you have thought this through in deep and you need that much I/O… but I’d thought I share my thoughts since your post seemed to ask…
Wow, this ended up longer than I expected!
tl;dr: Be wary of the allure of having it all connected: It is expensive, and isn’t of much benefit most of the time.
Your setup isn’t all that big. Many people here have much larger ones - and yet most get by without all that many channels of audio in/out. A channel of digital interface for every audio connection from every device is a lot of audio interface… and expensive to boot.
You should think about what you’ll be doing:
If you are building up pieces “in the box” - then it seems unlikely that you’d be recording from every one of those devices at the same time. You may set up drums through one pedal, record that. Then work on something tonal with the Digitone on another track, etc… You’re not likely to ever be using more than 2in / 2out at a time if you re-plug your pedals and effects as needed. For working this kind of way, huge amounts of I/O is an expensive convenience for not just physically replugging as you need. (And it isn’t clear to me that it is any faster to work with once you need to reconfigure your DAW to route as you would with plugging!) if plugging really bothers you, consider a patch bay - easy plugging, normalized connections, and a fraction of the cost of audio I/O.
If you are playing the ensemble live… then I think a mixer might much better serve you. You could eaisly buy a mixer big enough for everything… but that would be overkill… since playing live you are likely to have a way of routing for the piece - and that’s that. A mixer with a few sends and channels will be hands on, immediate, offer EQ and basically get out of your way. Playing live is different than recording a track, and there generally isn’t the push to get “micro” control over every bit of the audio.
Now - you might be desirous of having it all: Play the whole thing at once, never have to reach around for a cable, route it all via your DAW’s controls, and pass every individual part through the DAW for in-the-box effects, and recording multi-track so that later you can remix it. Going this path will require $$ for I/O, $$ for cabling, $$ for beefy computer, and a fair bit of time setting and mastering this rig. Is it really what you need? It doesn’t look to me like you’re aiming for a professional multi-track studio setup where you have everything ready to bang out the next track for the customer where you see these kinds of setups and the expense makes sense.
I do get the allure: I spent most of the last few years recording my live performances with rigs like: Digitakt, Micromonsta, Pulsar-23, RaspberryPi for effects, multiple controllers, etc…all just in stereo, post effects. Editing this for release makes you want individual tracks… but you learn to get by. Since I’m not lugging stuff out to shows in Covid-times, I’ve switched over to a MOTU Ultralight AVB - this is middle of the road: 6 in, 8 out, and mixer and effects in the unit itself. My live set can be divided into two or three stereo parts - and I record those separately on one computer while I’m playing, and have the mix from the MOTU go to the monitors and the streaming computer. Computer also records the full mix, and the Ultralight’s reverb separately. Sure, I still re-plug equipment for each set up as needed… but the I/O was only $650 - it’s one box, and it just works.