Low memory may well be the problem, depending on the settings that you chose. Can you list the settings that you tried? If you can make the files available via dropbox or google drive I can run them through one of my nodes and tell you how much RAM was consumed. Here’s a graph showing RAM usage on one of my nodes to process 493 photos in high resolution (this dataset):
Edit: Well the graph seems to be tiny on the page. For context, there’s 256GB RAM in that node. If you want to run a few datasets through as a test on one of my nodes you can drop me a PM and I’ll create you an account.