Why do these no-name, unrecognized colleges and universities so expensive with their tuition?

First of all, a lot of colleges you mentioned are not unknown nor unrecognized. They are accredited colleges, but they are also private colleges which means they are going to cost more. Also some colleges you named are for specified colleges such as International Academy of Design and Technology which means they will cost even more. Also the online colleges are convienced so they cost more also. So they have a reason to have such a high tuition.