Earlier quoted context omitted.
I wonder if the disk on a $40 Hetzner server would be fast/big enough for him. All the searching and storing of massive password hash collections. He has a writeup here on how he gets costs down in a big way: https://www.troyhunt.com/serverless-to-the-max-doing-big-thi...
I tried to scan through the linked article (and OP) but couldn't quite figure out Troy's storage requirements. Are they really massive? The sum of the GB figured shown in the OP doesn't even amount to 200GB AFAICT. But even if it's something like 10TB that's still not super expensive on many hosting providers.
($350 per day at .014 per GB)