Even so I don't think there's any engineer we could hire for $60k salary (or any salary for that matter) who could effectively maintain all of the functionality we get from these products, but if you know of one please send them our way! http://sawhorsemedia.com/jobs/
I've been involved in this side of a startup 3 different times over a couple decades: IT systems are not a full time job for a startup. They're not even a part time job. They're an every-once-in-a-while type job. At <30 people, all you need is one engineer that can also run a single small internal server. Just one.
Soon enough he or she will have to maintain your mail server, CRM, file server, bug tracker, CI service, backup services etc. and woops, your developer is now a sysadmin.
These systems largely run themselves, indefinitely.