I know the contractor who use to do the sanitary piping before I started..oops... Was 100/hr reg, 150/hr sat, 200/hr sun. Another thing to consider to purge gas and you will mess up fittings from time to time and have to cut them out and re-fit, happens to the best of us.
I use dedicated consumables, tungsten grinder, I was cutting and filing by hand but recently got a squaring tool which makes my life so much easier. I pickle the joints, and polish them out with my burnishing tool..inside it fine and just needs basic sanitation (we have a process for this).
Some of the sanitary tubing carries minimums 100ft, usually is 20 ft sections.