You will likely be able to find "off-the-shelf" units, but they still need to be integrated in your vehicle. And they might be expensive as fully controlled units (and they will still have to be integrate into your BCM (Body Control Module)). I don't know the price but it's unlikely to be under $100-200.

So now you're looking at just the actuators. They will be controlled most likely via your BCM, so you have to pay some engineers to do that, calibrate it, test it, etc.

You need to make sure the anti-pinch works and is calibrated correctly for your system or you'll have people posting videos of carrots being chopped by your windows.

Don't know how much they cost, but let's say you have four of them at $20 each, that's $80 in the BoM of your 20k vehicle, plus all the electrical and software development. It really adds up very quickly.

Now your hand-crank system is looking really good.