If you plan on wacking off punties on a gtt get a good torch mounted marveler and wack off on that. ( Wow that sounds funny lol ) No worry about denting it up or other cosmedic issues that way.
But as far as the price difrence any GTT you pick will pay for its self in saved o2 in the long run. They use a LOT less oxygen and less gas than a Carlisle CC
I can atest that Even the big gtt's eat less then a Carlisle CC.
The o2 system we have up at the shop.(onsitegas systems pro
has all it can do to keep up with a CC runing full blast. But I can run a delta torch on it and I have pleanty of o2 left over for the red max to be used at the same time. and the delta can make a lot more heat then the cc.
So if a delta can save enought o2 to run a second torch. one of the smaller ones has to save a lot on o2 if using tanked o2 or liquid even for that matter.