Is the C-150 and C-152 two different types or is that one of them 757/767 deals?

This is my advice as I once was a right seater in a Caravan before. You will not make money sitting right seat in a Caravan. You will build time and experience but you under no circumstances will make money. Unless you go up to Alaska and fly those Caravans, you will instead be buying the 2 for $.99 Jack in The Box tacos. You'll eat one for lunch and save the other for dinner.