This is why I started my journey very slow and easy with a semi modular Make Noise 0-coast and the free software VCV Rack. Learning the basics at low to no cost and ability try try hundreds of modules and patterns at home is wonderful so when I do buy a case/power and modules, I know what I will actually need without going bankrupt. I think a lot of folks end up with cases and thousands of dollars wasted because they did not grasp that fundamental point.