Ha, Ha, LOL your hubby must get laughs all the time, or at least on the weekends. Well, given that much smoke your goals should be very attainable. With that as a goal you could probably use a towel closet or something as well. In the shower, being that it is so high you will have those lights hanging to the very bottom of the shower at first unless you meet the lights half way by placing the plants on something. Shower will indeed work though. Let us know when you want to get the lights and we can dial you in on wattage, color and what not. Hydro is a better bet with HID IMO because of the time and effort put out you want to see a good return for your hard work.
Adieu