Do you have a good exhaust fan? I run 2 600s in a 3 x 6.5' space. I have air cooled reflectors and can keep things cool (under 80) by pulling cool air from my crawl space and exhausting with a 440 cfm 6" Vortex fan.
I would forget the 150W. While they are great when you can keep them close, at that distance, they are doing little more than wasting electricity--same with the CFLs.
I operate out of closets in my bedroom and bathroom--nothing wrong with that. It is much easier to keep stealth--my room is my personal space.
I felt just like your girl before I did construction. Now I realize just how easy it is to repair holes. Many people who live in apts go to a second hand store and buy doors to replace the regular doors and drill holes in those. When you move out, just replace the original doors.