Pantheon.io — Drupal and WordPress hosting, automated DevOps, and scalable infrastructure. Free for developers and agencies. No custom domain. - Source: dev.to / 4 months ago

Creating an account at pantheon.io (its free) and setting up a base install of a drupal 10 site there, learning how you can use their git repo to work with your code base, and hosting the site there. (sandbox environments are free). Source: 12 months ago

I run a majority of my client work on pantheon.io - you can read a case study of a high traffic site I launched there, 9 years ago, that handled a homepage link from nytimes.com with zero problems https://pantheon.io/blog/tavern-green-gets-details-right-pro-website-alphex-pantheon. Source: about 1 year ago

Regardless of which way you go,yYou can give it all a try for free by creating an account on Pantheon, which will let you spin up a free Drupal sandbox site, as well as a free WordPress sandbox site. Source: over 1 year ago

I had to do this for a job a few years ago. I created a sandbox version of the site on pantheon.io and removed all editing permissions. On additional discovery that they only needed the static content, I created a static site using SiteSucker (mac app store). They were able to put this folder on their local machine to access anytime. Source: over 1 year ago

Also, there are websites that give you estimates of how much another site earns from ads (e.g. siteworthtraffic.com). Source: almost 2 years ago