Was wondering if anyone on here has any info on replacing windows. I own a few duplexs and the the windows are in bad shape. The houses were built in the early 70s and the windows have never been replaced. I have about 50 windows between the houses that I am looking to replace. I dont need anything top of the line but also dont want to have to do this again in 10 years. I had one recommendation of ply gem windows. Has anyone dealt with this manufacturer? Most of the windows are roughly 3' x 4'. Whats a decent price for replacing a double hung window of this size including wrapping in aluminum? Any input would be helpful in my decision.