Welding Tips and Tricks

Hi,

Please advise which brand/ model to use for service van welder.
Requiements: 300A DC, MIG/MAG Pulse , Stick, Tig
Brands what I consider are Fronius, EWM, Kemppi, Lincoln & Selco..
My main concern is that I leave welder inside van, and it stays outside with -20 C temperatures + Also vibrating conditions.
What is Your experience?
I am located in Europe, so Miller is not present in here very well...

UPDATE :

Made decision to buy EWM Phoenix 355

Hi Andrus, how is the 355 working out?
I looking at buying one and would appreciate hearing if it's a good machine!
Cheers!