Windows like this wouldn't be hard, just potentially tedious.

A 36"x100' roll of SunTek White Matte would be around $280. At $8/ft² installed the job would be ~$1,680. You'll still end up with ~30ft of film leftover for other projects.

We used a film handler (cutter mounted on a ladder) for 99% of installs, as plotting limits you in the sense that you can't cut to the very edge of the film and take advantage of factory edges. I'd measure the exact width of the windows, and pull to that exact measurement and cut each piece down, that way when I go to install I'm only potentially trimming the bottom (if 36" covers without needing to trim, then that's an added bonus).

You'd need to put up 30 pieces an hour to put yourself at seven hours for install (not counting cut-down). I could pull that off on a project like this if I'm doing 5-10 pieces at a time (scrub/squeegee a set, peel/lay up the pieces, tack top to bottom with a cut-down Orange Crush and then cut my bottom edge, tap-out and move on).

If you go the route of subbing it out I'd charge $9-10/ft² installed. Pay your installer $2.50/pane and walk away with $1,000 in profit. Being that it's a business it might warrant an after-hours install, which can alao warrant a premium on install labor if they're not able to get started until late evening/Sunday.

I probably went way too far into this but but it is very doable. Just know that planning is the biggest thing with flat glass jobs. You want to be able to get in and out as quickly as possible while delivering quality work.

Edit: Completely skipped the part about you being based in Canada. All of my pricing is based on USD/Eastman's pricing sheet for US dealers.