Looking for a welder in Pleasanton, CA (selection help and battling being cheap too)

That is a decent little welder and should be good for what you are looking to do with it as long as it works. You should be able to give it a test before buying it easily since it is running flux wire. The gas regulator is what connects to your argon/co2 mix bottle for mig welding. You will also need to change the polarity to have the positive connect to the gun when changing to mig.