[nkristoffersen]

How often does your server go down? If this is a common occurrence that you are stressed about it, try to solve that first.

My advice will be a little controversial in this thread, but cloud providers are really perfect for building durable products. Any situation you can find where you can trade dollars for durability is well worth the ROI as a solo tech owner. Load balancers, auto scaling, aurora clusters, s3, these are all services that help me sleep like a baby even though my SaaS needs a perfect uptime. Expect instance outages, so keep your servers stateless and run at least 2 instances, as small as possible and go horizontal.

Another good idea is to learn how your product can die. Load test, try to break your app, and then fix those weak spots.

These are my opinions and experiences, and have continued to serve me well.