Modular synths, eurorack is where you find the most accessible modules than the other formats. Sometimes you go and spend 600€ in a module without batting an eye.
Also you have to count the case, patch cables, etc.
It gets expensive quickly if you can’t fight the GAS (gear acquisition syndrome)
Also it is a musical instrument so you need to practice many hours to play it affectively.
It is really cool, I do enjoy myself playing with my modular, but would love to have more time to spend with it.
There is a cool video by David Bennett about this. I can’t seem to remember if he mentions who was the first one, but he puts on a lot of samples I wasn’t aware of
https://youtu.be/fJf8MhLQz-8