there is already a couple of good threads that cover this in the colorado section.
BUT, to be a caregiver for someone you need to be able to do more then just supply them medicine, the laws now expect you to do household chores and the like to be considerd a caregiver. Im unsure if multiple caregivers can live together at this point or maybe just one of you can become the caregiver and grow for everyone. A singel caregiver can grow for up to 5 patients. if you become the caregiver this means you can have 3 other peoples plants at your house (you, your wife, your roomate, and 3 patients) Because youre allowed to have 5 patients total plus yourself from what my understanding of the laws are.
Also be aware if you become a caregiver and grow for patients you have to register your grow with the state and they are aloowed to come inspect it at any time. This is actually why alot of people have stop being caregivers for other people. They dont want to have to allow the police into their homes any time they like.
Good luck with whatever you decide and I hope I helped at least a little.
Andy