Guides are a touchy subject on the ND boards. If you and your friends combine knowledge and freelance it next year, it'll be that much sweeter. Only you, know you. Do your homework and get what you can out of your friends experience and roll out next fall. You don't have to have the big field spread like you always read on here. If you only have water dekes, use them and hunt the sloughs. If there is a town where your friend stayed, look up that towns website and they'll more than likely have houses to rent for hunters. You can get by much cheaper and feel a lot better about it by doing it on your own.
Questions, let me know.