I need to add another portable welder . I want a lincoln " pipeliner " ,but from a strictly business stand point I do not know if this is the machine I need . I need to air arc 1/4" carbons minimum , stick 7018 5/32, fluxcore gas shld .045 min.(29volts)& solid wire.045 spray transfer(32 volts) I am leaning toward a Miller 302 or 402,or Lincoln Vantage 300 or 400,but I only have $6000.00 to spend .And beside I have always wanted an old Lincoln. any suggestions?