Oh, I know quite well about what happens when you go off your chops. My instrument of study was voice during my undergrad, since this was the 1980s and the school I was at was not keen on having electronics as an instrument. Soooo...many years of vocal training, solo and ensemble work, studio stuff on occasion, etc etc, but when I got into graduate studies in composition, I finally got to deal with electronic instruments on the level I'd wanted. But I quit singing. Mind you, I can still sing, and that vocal training was the sh*t for the sort of exacting ear training that electronics require. But like any other set of muscles, they lose tone, and these days I can choke at the drop of a hat after some 30+ years off of that training.
But at the same time, I fight constantly with chronic physical pain, and I don't have stamina, and etc etc alla that. And yet I still mess with electronic instruments, some of which I can barely move these days. Do I contemplate quitting? Oh, hell no! If anything, it gives me the determination to push this effing envelope as far as I possibly can before some total physical epic fail happens. I've even considered picking up low clarinets again after many years to add THEM to the fray, although I'm still looking for just the right bass and alto to live with (and get fitted for piezos) for the next couple of decades. But me, I just work at this until the body says "ENOUGH!!!" then I fall over and wait for the pain to roll back...then I dive right back in again. Lather, rinse, repeat.
If I worried about the past, and how my abilities since then have been impacted, I probably would wind up living in a refrigerator box. But this studio I'm in doesn't look like any refrigerator box I know. The only thing I concern myself with is to continue with my music and everything that goes along with that. Since it's not possible to predict anything in the arts (for the most part), I prefer to defy limitations and be ready to go 100% full-on anytime...instead of imposing limitations on myself or (especially!) my music. Might get painful; don't care. Physical things are transitory. Music is not.
Anyway, getting back to tech here...no, 1 x 104 hp is way too small for what you're envisioning. In order to get some interesting results out of time/phase-based cellular forms (ie: "minimalism") you're going to need quite a few modules to screw with the timing behavior: comparators, discriminators, Boolean logic, clock divider/multipliers, Euclidean sequencers, etc. Done right, you can wring loads of power out of these. As for a suitable case, ample power, etc...look at Pittsburgh Modular's Structure EP-360 instead. 3 x 120 hp there, power supply is super-beefy, form factor is like a large briefcase, and its wood case is built like a brick s**thouse. And with 360 hp, you'll have ample room for the various timing toys and sequential thingys that minimal/process stuff needs. Seems like much more of a realistic start.