It's been a while but let's see if I can revive this thread.
What size cylinders are other builders using?
What length of hose are you using?
Do you raise the outlet pressure to compensate for pressure drop?

The reason I ask is because my shop is small, it would be most convenient to mount the cylinders to the shop wall and use 25 ft. hoses. This would enable me to reach everything in the project, including outdoors in front of the shop where I will start practice work and small part fabrication.

Alternatively, I could use the 10 ft. lightweight hose and a cylinder cart if it really is best to be right next to the regulators, and if standard hose is too ungainly and pressure drop is unacceptable in the longer hose.

The equipment I have so far is the Miller Smith Airline AW1A torch and tips and a rudimentary welding table. Since I will have to wrangle the cylinders myself into and out of the car, they can’t be too heavy. On an EAA forum thread, somebody said 80 cu. ft. of oxygen is enough to weld more than one fuselage. Can that be true?