I had a tube notcher like Dan's and sold it as it was no use for fancy tubes, it was just easier to do it by hand before I bought a mill. Again as dan say, if you have space for a pillar drill you have space for a small mill. The foot print of my first mill is suprisingly small.
Don't have room for a milling machine in my workshop, what's the next best thing? A tube notcher and a pillar drill?
I used printmymitre website to make my cargo bike, but its not brilliant..