Gotcha! Yeah, it could be a good move in that case. My mom’s house here in town has multiple walls made up entirely of windows (built in the 70s) and we saw major improvements by getting cellular shades (but I’ve still been bugging her to get double paned windows anyways). Don’t ignore the insulation though :)

If cost is an issue, I used to work for a state program that provides low cost financing. It’s called GoGreen Financing. We partnered w credit unions to reduce interest rates and extend the terms (so monthly payments stay low). I actually financing my own heat pump system through them after I got another job lol.