Home Made Windows

I am building on a budget, as many seem to be also. I have probably gone through the same efforts that all others have in trying to find low cost windows. I have pretty much given up that quest and am now considering fabricating my own. Maybe people have some good ideas and would like to post them here. I have come up with a couple myself. Here is one I have come up with after a trip to the hardware store. How about taking composite plastic "L" shaped molding that gets used in home construction and frame all around the window opening as you see in white in my crude drawing. Then after that attach 3/4" aluminum "L" as you see in grey in my drawing. Then frame a sheet of plexiglass with a small "U" channel, attach to top of framed opening with piano hinge at the top.
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