Question: "I would really like to use TIG to weld my fuselage. The problem is the initial cost of the TIG machine?"
Answer: "What I suggest to the undecided, is to purchase the Gas set-up and start practicing. You need a torch anyway, and the physical techniques of dabbing in the rod are identical.
Then, if you realize that you won't really be satisfied until you have the TIG Welder at your house, you will find a way to buy it!
If you are happy with your gas torch, you'll be ready to build!"
Colin