OK, so I was reading Ston's post about plants getting bigger than planned (grow journal) and thinking it'd be cool to grow one outdoors except for the law's restrictions, possible pollen contamination etc (and never grown od). Then I got to thinking about a greenhouse...well, sort of. I have an upstairs deck off my master bedroom that could easily be converted to a glass room (greenhouse, more or less??), and am wondering the benefits to this over the cost. I have builder friends, so cost of construction shouldn't be too bad, but I'm guessing a couple year's worth of electricity, at least, but the room could be used for growing as well as for relaxation (sitting in the bud room with a nice coffee and the paper/book comes to mind). Living in MI, a room would add to the grow season and all, but again, would it be worth it? Any thoughts?