> "The computation for the 512x512px training set was run for 20 days on an IBM AC922 POWER9 server running RHEL7, utilising all four Nvidia Tesla V100 SXM2 16GB GPUs."

That's super overkill. If you just transfer learn from a good checkpoint you'll get good results in a day or two on a V100 (probably even a P100), especially at just 512x512. (I've done this lots of times and a colab pro account for $10 is more than plenty.)