That's exactly how I used to work about 15 years ago, but I found that the Apple trackpad killed my wrists. These days I just have a regular mouse, and simply try to do as much as I can from the keyboard.

I agree trackpad is not RSI-proof by any means, but for me mousing is worse. With the trackpad in the middle I can use either hand to scroll or click etc. I also keep that minimal and instead rely on keyboard tools like Vimium, and scroll kb shortcuts