Been doing more research, what's everyone's thoughts on using Argon-Oxygen blend, or an Argon-CO2-Nitrogen blend for MIG welding austenitic metals?

I've been doing quite a bit of research and I understand using a helium tri-mix is ideal for welding stainless steel with the GMAW process, however I've called every supplier in the state and none sell tri-mix in small bottles. This is a one time job so I can't really bring my self to dropping $300 ...

Hello. So I signed up for the forums because I've been watching Joes videos for a while and I had a few questions for you welders. I want to become a welder, either pipe or structural. I looked into welding school, but they are too far away and they are expensive. I can't afford it unfortunately. Gi...