hi anon - curious what hosting provider you are on? (understand if you don't want to divulge, but I'm the anon building wearethene.ws and would like to avoid similar issues, as far as I know I have picked a good host though)
from a tech perspective I would also recommend that you pre-generate as much data as possible, instead of doing calculations during each page load, and/or put the site behind cloudflare. That should be the easiest way to help with resource usage.