I don't think we will start with an oxygen concentrator....Our plan is to just get an oxygen tank and start there.
However, I would be very interested in why an oxygen concentrator might be better; perhaps you could address this for me?
Oxygen tanks provide 100% oxygen as a starting gas, which is the best. But they can be quite heavy and you have to taken them back to the welding supply to exchange the tanks with a filled tank.
The alternative is oxygen concentrators, which produce around a 95% oxygen concentration. They are generally loud and you do have to have them serviced once in a while. But you have a constant oxygen supply without having to run back to the welding supply to get a filled tank. They definitely should not be used with hot corona devices for insufflation or injection since there will still be other gases present that can lead to acid formation.