I made this mistake twice. Quite frankly, I wouldn’t do it in your position if I knew then what I knew now. You will spend at least 2-3x what an extremely capable semimodular would cost you, and you’ll still be missing features in comparison. Start with semimodulars if you haven’t (Pittsburgh Modular Taiga, the Moog semis, the Behringer Neutron/ Proton, hell, even Injtellijel Cascadia if you want to save for a while and go big). Then, when you decide you need/ want different features/ sounds/ processing/ whatever, get a case and start expanding.
With intentionality, figure out why you want a customizeable monosynth over the “because I can”. It’s like wanting a car so you could change out the engine… ok but how much time are you going to be doing that versus driving? Do you enjoy the tinkering over driving/playing?
Custom often isn’t better, it isn’t smaller really, and it sure isn’t cheaper.
It’s really hard to get started in modular because you just don’t know enough to really make informed decisions about what you might want to try, what pieces fit together, what you’re even trying to accomplish. But if you’re committed to learning and experimenting in order to answer those questions for yourself, it’s extremely rewarding.
I jumped in by buying a complete system, which is super expensive but also super helpful because you have so many building blocks to work with. It’s tempting to start small, maybe with one of the many semi-modular units on the market, but I think it’s harder to see the real potential of modular when you’re confined to those particular designs.
Come on over to the “Your modulars” thread if you want to ask questions or get recommendations from folks who have more experience — any info you can share about what you want (music style, synth experiences you’ve enjoyed, budget, etc.) are helpful. I’d be happy to throw together a starting point rack for you in Modular Grid if you want to get some ideas flowing.