Are you planning on building a system or buying one? Building is probably a better way to go, as you get exactly what you want. You should look through the forums more, there are some really good posts that cover cabinet/stealth setups. ScROG seems to be a good way to grow in small spaces. I plan on using it. For odor, an ozone generator, air ionizer, or carbon filter will work.
Please correct me if I'm wrong, this is only information I've read through the forums or books.