Yeah I have been trying to do some calculations myself luckily 1/2inch glass isn’t too expensive for a 72”x24” piece of glass I got quoted at $160
If you grab that 180 then you will have three of those panels for $100. Just need to spend a little time cutting the seams, cutting off the silicone and scrubbing the edges with acetone. Maybe run a polish over them if you feel its necessary.