pay the 60 and be done with it, glass is a pain. doors anr easy and if the glass uses a rubber gasket they are not too bad. But when you get to the adhesive forget it, first or all it has to be heated, they use a special gun, you can put the tube in the oven for a bit @ 400 deg. 8 to 10 min.
but cutting them out and the cleanup is a mess, then you still have the trim to deal with. I would gladly pay the 60, I put windshields in my own junk but wouldn't do it on the side.
Hope this helps, and good luck.