Block house, or stick house?
Since you need a permit to replace a window here (six screws out, six screws in), I may know of a guy that replaced some of his old anderson crank windows, with double paned vinyl windows. When he replaced his first (call 2x3) window, it cost him about $79. They have since broken the $100 barrier. A call 2x3 is around 3 feet wide, and a bit taller than it's wide. Sound is remarkably reduced, drafts are a thing of the past. You can no longer feel the heat radiating from the window when it is hot outside.
The trouble with older block homes, is that the window openings may not be a standard size. Same goes for stick homes...but at least with those, altering the opening isn't such a pain. (making sure the opening is square, can be fun too).

Oh...I saw this guy, replace one of his windows in just over half an hour. He probably took about 8 minutes to caulk the edges.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D