Master Agency Site Infrastructure: What You'll Achieve in 30 Days
https://extra-wiki.win/index.php/Reliable_Hosting_for_Agencies_Managing_10-50%2B_Sites:_Build_a_Repeatable_Stack_You_Can_Trust
If you run a small to mid-size web design agency managing 10-50+ client sites, you need hosting that just works. You don't want to become a hosting expert