I looked at your Link. I have been welding 30 + years and
haven't heard of an inverter welder.
The Seller on Ebay did not give any specs. on his machine,
you could contact him.
I suspect it might run on a battery, but without a model #?
A mig welder is excellent for automotive use.
Better heat control. Mine has a spot welding attachment
for body panels.
Where I work, we have a suitcase 120 VAC mig unit.
Used for outside projects, gas-less, with flux cored wire.
No gas and flux cored-wire, eliminates the problems
associated with the wind blowing the shielding gas away,
causing a bad weld.
Flux cored wire is more expensive than hard wire.
Never did a cost analyse between gas, hard wire and flux-cored.
You can email with more questions if you want to.
I prefer a mig machine with gas & hard wire for small projects.
For structural, like buildings, gas and flux-cored wire
gives better penetration and can pass an engineers
Field Weld Test.
Hope this helps.
Wingman