I think it would be fine, I suspect its the same clone machine as my plasma cutter, I just don't have the Tig / stick functionality. The arc from the plasma cutter is certainly strong enough to weld with, just the wrong type of tip.
I do have a handbag DC Inverter welder the same size & it does everything I need .
The one in all would save space on the welding trolley , thats for sure, and unless your doing heavy gauge work (e.g. tow bars) its all you need.