The Internet is breaking all the time anyway. Every day at least one of the bigger / more important sites I visit has a temporary problem with something. Three days a week HN keeps returning CloudFlare errors to me. Even Facebook has some issues that break it every other week. The world isn't ending because of this, and it isn't going to end because the site I co-host with my other friend is down for the night.

As you grow to the point where close-to-perfect reliability matters, you'll be able to afford to get someone do handle the hosting for you, just like you do today.