I'm running a Hobart 140 and discovered why it's worth spending a bit more up front!!! Your flux core machines, even if equipped for gas....which you eventually will add, don't have a solenoid shut-off for the gas. It won't be long before your gas keeps on flowing when you release the trigger and at $27.00 a bottle it only takes a couple wasted bottles to have to replace the whole handle/line assembly for $100.00+.
Might just as well spend the extra bucks up front and get a machine that will get the job done correctly.....with a solenoid. For my money you can't beat the Hobart 140 110v machine and a GOOD quality adjustable auto-darkening helmet for those lower amp setting welding jobs.
Dave