Keep in mind that all new machines will be solid state IGBT machines, consequently, repairing them for failed components will be out of the realm for the average 'Joe'.
Only the very cheapest machines will still be transformer machines as 99% of builder have went IGBT. IGBT machines are often...
I much prefer the HF scenario versus the alternative. In 20 minutes I can have a NEW machine if necessary versus playing the return via shipping it somewhere and dealing with a delay.
Whatever blows your dress up. In my case I know exactly what blows mine up.
Hard to beat ANY IGBT machine today. They are very efficient with electricity usage and most of them are 100% digital readout as well. You really cannot go wrong with any of the HF welders in the mid price range, Titanium or Vulcan. Lots of them online (Amazon) as well but, if you ever have...
I have (own) my own machine and fabricating shop and have 2 full time employees as well. A few months ago, I sold my Lincoln Square Wave TIG / SMAW capable machine and my Hyper Therm computer driven plasma unit and purchased a Harbor Freight 45 and 60 amp plasma cutter(s), the 45 amp unit...