To be perfectly honest, a good PS is such a long term investment that personally I wouldn't resent spending several $100 on it -
Problem is that one can not purchase a purpose built quality 50A 24V power supply for $100 or even $200 for that matter. Price some Meanwells or Mastech bench power supplies. On top of that it has recently came to light that these are not as clean / stable power out put wise as the server power supplies are.Well at least not when used with a specific charger.
Durability. I have had 3 nominal 12V 15A switcher power supplies to die on me over the years they all cost more and they all saw less usage than any of my server power supplies have. I have tried to kill my server power supplies but their built in safety devices are just to good. I am fairly sure that some do fail in service but it must be a very samll percentage.
If it were not for us tinkers RC would not be nearly as much fun and there would have been a lot less advancements made.