I'm thinking that once you, along with any companions, goes down into the basement that none will leave for 10 years. Any Dr visits would have to be done in the basement with little contact as possible. Since you are being forced in this situation, its safe to say that the interaction will be monitored.
Regarding the greenhouse, plants can grow thru man made light, so those of you expecting sunlight thru the greenhouse need to account for that.
Regarding other forms of interaction, there is none. You are shut off from the outside world unless you spend pts on that interaction (Girl/Bonds, computer, radio, etc). Your supplies will be lowered to you.