You ain't wrong !! I don't know about that brand of welders but most of the cheap ones do not have an internal cooling fan so soon as it heats up on a long weld it trips the internal breaker till it cools down
plus most of the cheap units have a plastic wire drive assembly,etc.etc. etc.
spend a few more bucks and buy a good unit (Hobart.Miller,lincoln) A typical Hobart handler,cart,tank lease,large roll of wire,extra tips,fill the tank with argon/co2, and a auto dark helmet,will set ya back about a grand ( A Buddy just bought every thing last month)