Have you thought about installing a blackout cellular shade instead? I bought a shade for this room I’m sitting in that’s basically two shades in one: it has a shade that lets in light and one that blacks everything out. If you want daylight, you pull the one shade down, if you want darkness you put that shade fully up, and if you want access to the window you put them both up.
It was IMO pretty affordable. I think the one I bought was around $300, and I have pretty large windows.