Hello iv decided to build a mountain bike frame and need some help.
But first little about me I'm a welding student at mt sac in socal I'm GTAW(haven't started the class yet) I'm currently taking oxy,beginner arc, and basic electric arc welding. With that out of the way here are my questions

-witch should I use GTAW,oxy or braze
-if I use oxy or braze will they holed on mountain bike ( rather not kill my self going down hill)
-material and cost what my material should use, I want something strong and light weight not super expensive, and where to get it (not online)around chino)
-general cost of material (exclude welding supplies I'll be welding at school)