Anon951
It looks like there are also issues with database connection - I'm guessing running a free site on a cheap server is beginning to run into its limits?
I guess there are also some limits to running a site anonymously. Last time you were down and lost a lot of thumbnails for products prior to 2018, which was a really sad day.
Maybe there is a way to distribute the content over multiple domains/servers? One server per each large category? Put a global header with navigation between them, then it's just copies of the WP but less load on each server?
I really appreciate you keeping it free. I wish I could help somehow with deployment, but I understand its not possible (privacy).