id definately say do it!...
id never done much welding before i started the roadster, and taught myself through loads of practice. Nothing comes close to the feeling when you master it and are able to weld neatly and consistantly. It sounds daft but its a bit like the primevil feeling you get when you have a bonfire (or is that just me? i wont mention my teenage pyromania problems
). The biggest milestone was welding the fuel tank up and finding it pressure tight.
I love welding so much im now thinking of trying to get an adult apprentiship to do it full time. All thanks to finding BYO sports car one afternoon.
Sure the welder might gather dust once youve finished the chassis, but its always there shoud you need to fix your car or make a new gate etc.. I bet iv recovered the cost of my welder twice from fixing exhausts etc for the lads at work.