I hear you, midwest country crap... I went to an aquarium society today that not a single member had saltwater... was still fun and got some crazy deals at the auction, like a 55 gal tank for 9$.. and a box of goodies for 5$. fun ride home, 2 ppl, a 55 gallon tank, a 5 gal and a 4 gal and a big box of stuff, (no trunk due to subwoofers...) in a 2 door bimmer.
About the build though, looks awesome! If you dont mind me asking how much did that all run you? you said 30$ more than buying it outright? And about that glass pane idea, prolly not a good one. If MH light is anything like sunlight (which I think it is) shortwave radiation. It will hit the pane and once it hits a colored object it will turn into long wave radiation (heat). The glass doesnt necessarily magnify or amplify it at all, unless its curved, but it will let light through and not let heat pass back through... according to my geography teacher anyway, lol.