Jdesole, planning racks is fun (I spend so many hours on ModGrid myself) but I suggest you log some hours and build up some experience with Modular on VCVRack2, maybe focus on the ‘real world’ modules available there, like Instruo, Mutable and Befaco. It’ll also solve all your mixing needs.
If you’re still early in your physical rack, get an Expert Sleepers ES9 so you can patch into VCV. It’s the first module I ever bought - invaluable for learning. Even if you want to be fully physical in your modular, unless you’re loaded and have immediate access to any module you want, it’ll be a long time before your rack is fully realized. You could learn with the ES9, help you make the right choices of what to purchase, then sell it later - they’re in constant demand.