Screen Quote

Just received my free quote on custom wood frame combination storm and screen windows from Adams Architectural Wood Products and it seems reasonable. For one 32" x 64" window they are only asking $157, not including shipping. The specifics are here. They would hang like our current storms and screens but there wouldn't be the problem of storing the out of season windows. I just wonder if I could build the same thing for less money? Would it look and function as well? Has anyone out there tried fabricating their own storm and screen windows?