Find a new polishing machine, but which one suits me best?

Good evening dear forum, I am looking for replacement for my previous polishing machine. Currently I use a very simple rotary machine from my father. This was very cheap and has simply very little power, is loud and above all it takes some time until the condition is so acceptable to me. I have completed vocational training as a vehicle painter, but have not been working in this trade for about 10 years. I work about 2-3 car as a side purchase in the month and can therefore work on e I would like to go a step further in terms of holograms in particular by adding an excenter machine. Unfortunately, I have no experience here, only know Rota or even Excenter sanders for e.g. spatula work. My considerations would be to use a Krauss Mini Eccentric Polisher S75 (500 Watt) for small spots as well as bumper etc. The Flex or Rupes with approx. 75mm would certainly be a better solution, but price-wise do Is it worth the extra edition or do I come to the result as a trained semi professional with the Kraus ? As a replacement for my cheap Rota would interest me, after Internet searches the Flex xfe 7-15 150 (preferably with 125mm plates) . Or yet a with forced drive e.g. the Flex XC 3401 VRG I am looking for a good all-rounder of defects, scratchers and as a finish one leaves the easiest hologram free surface. Which Flex fits best to my requirements ? I where If you are in the South Palatinate, there are companies where you can test different machines ? Fair or private would of course also be a fine thing. Would be very grateful for advice or thought.