Don't listen to the very narrow thinking, That you and your friends are too young, too irresponsible and so on, Just by hearing your logic it's apparent that you are a very intelligent and reasonable young man. You already know that you can make it work so you don't have to argue that point. Just work out all the details with your friends for any possible unforseen occurrence such as someone has to leave college due to family emergency. Possible buy outs- must be postponed until the end of the 4yrs. Then have backup plan, do you rent the room? Have it in writing!!

That is incredibly smart. I think you should do it if you feel comfortable with your friends, as it seems you do. You are setting yourself up to be one step ahead vs. Drowning in college debt. Good for you!!!