Yeah, that's the bundle that works best for the Phenol...quite familiar with it.
If that's the general idea, my take on how to approach this would be, in order: 0-Coast (which you have), Phenol bundle, Field Kit (because at that point, you will need a mixer), then the Modulor114. Then...surprise, surprise...the Ants!, because at that point you can break it out in all directions and no longer have to depend on its sound production alone. It becomes part of all of the other patchables for beefing their capabilities up, making it an 'expander' for the whole rig rather than something with an inherently weak sound in of itself.
Then...once you get up to speed on that setup...add a very simple Buchla device. In fact, what I have in mind is only two modules in a LEM3: the 252e Polyphonic Rhythm Generator and a 223e Kinesthesic Input Port/Controller. Yeah...that's about $6k, but it gives you a combination master performance controller and sequencer which can either patch directly to the Phenol or, via a format changer or two more, can interface directly with ALL of the rig, giving you the rhythmic/CV sequencer plus a 3-space multiassignable touchplate controller. Terrifying! But it integrates the entire pile of stuff as a singular instrument, and in essence, you've already built the 'rack' out of the patchables. If you did feel the need to add Eurorack (or other) modules after that point, the amount needed would likely be minimal, and limited to exotic devices, as all of the basics would be handled in the integrated patchable rig.