I solo ran a web hosting service way back in 2000-2003, well before cloud when it was mostly LAMP and CPanel. It was super mission critical stuff for 20000 sites and I was totally winging it. As it grew I got totally paranoid about uptime. Long story short, at some point there’s no substitute for getting a human to help back you up. I had this company that I paid $250 a month for that was helped monitor and would jump in to my servers to troubleshoot if I was unavailable. They rarely were needed and when they were it was usually just an Apache restart or similar. Best money I ever spent.