More than likely your roomates are going to find out. It is really hard to hide. So, if that is going to cause a big problem for them or you I would not grow there.
To answer your questions though...
- CFLs generate very little heat. In that space you could probably put 4-6 26 watters, or one big 100W. Maybe even more. Like I said, they put off very little heat.
- Yes, two CPU fans (one intake the other exhaust) should control any heat issues.
- I am not a big fan of ionizers. You could try ONA. (Odor Neutralizing Agent) (Google)
- I don't know about clones, but you can get seeds from lots of places. I think there is an entire forum dedicated to it on this site.
- No, other than pissing off your roomates. Lots of people grow like that.
- I only use CFLs for clones, so I will let someone who grows with CFLs start to finish answer the last question.
One more thing. You said that you were going to hack the mother to take clones. You know that you don't have to kill her to take clones right? You could keep her alive with minimum effort to produce clones indefinately.
Also, you may want to start your first plant in a bucket smaller that 5 gallons. Start with like a quart and work your way up. I am not sure if it makes a huge difference, but I have always believed that if you let the roots stretch out too far, it will detract from the growth above the soil. And, afterall, we don't smoke the roots.
Good luck.