I have been thinking about building a custom tank in the next year or so and am now in the planning stages. Im am now weighing my options on whether or not it would be worth constructing the actually tank itself vs buying one (im a police officer and dont get paid alot). The dimensions I am going for are 8'x2.5'x4' (length x width x height in feet). If my calculations are right it should put it just under 600 gallons. I need reliable (not opinions) information on glass thickness, bracing, weight/ safety concerns on a tank of this size. My main concern is safety number one as I have small children and secondly cost. I have lots of resources as far as construction goes and am very close friends with a glass worker (but he doesnt have aquarium experience, but could help with the construction of the tgank and cost). I am partial to going with a plywood tank but I would rather have more viewing area. Thanks for any assistance.