In my opinion The best economical Aluminum TIG welding machine is the primeweld TIG225x.
I have been welding with this machine for a few years now and to me, it does everything I need it to do.
The arc is smooth, the controls are easy to set...(watch the video on settings below) and it comes with a nice CK worldwide air cooled tig torch and smooth low profile foot pedal.
In my opinion, the primeweld 225 is one of the best choices in affordable tig welders.
The problem with most other really affordable tig welders is usually the foot pedal and the torch are just bad and clunky.
Primeweld went to extra expense to include genuine ck torches with superflex hoses along with a smooth SSC style foot pedal.
They also have a responsive primeweld equipment users group on facebook and also have demonstrated great customer support
Watch some primeweld videos and you will see what I mean.
If you are looking for an aluminum tig welding machine that is both affordable and capable, then I think the Primeweld TIG225x is the best option on the market.
Not only is it a great machine at a great price but primeweld stands behind their products and takes care of any issues right away.
I have welded with all kinds of tig welders over my career and I am really impressed with this one.
you may have seen the video of my side hustle a while back and I can tell you that with the exception of one job I had on really thin aluminum, the primeweld TIG225x would have been perfect for my side hustle jobs.
Here is the video on my side hustle jobs