At minimum you need a data replication and backup strategy. You're exposed to things like drive and RAM failures on dedicated hosts, so you'd need to think about RAID at least, unless you're running a system that clusters at a higher level (but then you need multiple machines).

However this is basically a matter of learning or hiring/renting a sysadmin to do it for you.

MTBF stats for different classes of hardware at different hosts would be valuable to have, as it can be affected by things like datacenter temperature. But I never heard of such a dataset.