you can't weld much with a mig welder under 500 dollars.for 500 dollars you might get a used 135 amp mig welder with just machine.then you will need bottle,gloves,helmet,flowmeter,and other $$ things necessary.best is to get like the other guy said an arc welder and a oxy/acetylene cutting rig.i on the other hand have too many tools to mention although i will tell you that i have a miller dialarc stick welder,thunderbolt ac/dc,lincoln ac 225 buzzbox,lincoln classic diesel,miller legend,and a new miller bobcat 250nt.i also just use oxygen propane but i have many acetylene cylinders for heating,bending,brazing,and welding.