i really don't understand how can you plan buying the whole rack in advance?
i changed my mind 1000 times and today's rack is not even close to planned one.
you need gates and triggers.start with simple, explore and observe.
once you know what you need then it's easier to find it .
all of that modules looks easy for beginners because they see few knobs, but truth is I mastered maths after 2 years of learning..Have morphagene 6 months, barely scratched the surface.