I’m curious about the durability of these PCBs. They would be good for prototyping but how well would they handle high humidity environments?

Don’t even have to go that far, just change your DNS to a non-Australian one. Anything that turns up from a “top 10 dns providers” search works.

Maybe offer to shout them a nice dinner once a month. I know it involves money but it’s more of a gift than paying their bills.