What do you plan to use for a master clock? Something external? I see fair amount of modules devoted to processing clocks/triggers but no main clock within the modular, though maybe I’m missing something.
I personally would probably go for a Pam’s New Workout instead of the RCD and expander, and it would also be able to do a lot of what you might use the A-162 and A-143-9 for. It’d also give you some modulation options, too.
I agree with @billyhologram to swap the A-130/131 out for Veils, Blinds (works as a polarizer but then doesn’t work as well as a straight VCA), or Quad VCA, though you may not need that many VCAs along with the Bastl right off the bat. The Mutable/Intellijel options work as mixers, too - not sure if the Doepfer ones can do that, but you’re definitely going to want mixing with so many sound sources.
Regarding the idea to replace stuff as time goes on: I’d personally opt to buy the stuff you really want in small steps (including used) rather than buy a bunch of cheaper stuff at once. You can do a heck of a lot with very few modules, especially if you really learn them, and then you really get to know what you want/need since it’ll come from thinking “if I had a _____, I could use it now” rather than trying to only imagine everything first. Check out some of Comparative Irrelevance’s “Three Module Challenge” YouTube vids for ideas if you’re not already familiar!
For example, Morphing Terrarium, Maths, Turing Machine, a LPG or LPF, a VCA module, and reverb could easily be a fulfilling instrument in itself IMHO.