Not sure about your area, but a wireguard accessible OOB connection is a great piece of kit to keep handy. I use a cheap 768kbps SIM in an Ethernet connected switch into my personal systems. It's saved my skin numerous times.
I'm sure this is obvious, especially in hindsight, but just mentioning because the existence of IoT LTE data plans for a minimal fee ( $100/year for me in Midwest US) was NOT obvious to me until 2 years ago.