This is exactly how I run my (also monitoring) SaaS and it shows that the OP has learned how to minimize risk and prepare for the worst.
You are married to your mobile & laptop.
I also shows there is no free lunch: you need to invest in redundancy.
This is not a long term solution though. You need to add people and take a break at some stage.
I have backups, I have clones. I've still been in partial outage for 4 days and will be fully up tomorrow when I literally drive my servers to a new DC. Surprisingly I have slept 8 hours every night and I'm not worried. I've been in contact with my customers and provided solutions to keep them alive. If they leave they're going to leave, nothing I can do. I am looking to make sure everything is built uniformly (the server that died was the last of an old build process) and invest in scaling to the cloud in a bit more efficient and orderly manner.