What are the essential skills, knowledge etc. you should have if you're going to colocate?

I'm sick of being let down by dedicated providers and am thinking of just colocating but don't want to find out afterwards it isn't for me.

The plan is to have several boxes with IP failover so even if a couple of them fail, I will still have my site up. This means trips to the DC will be minimised and I've got just about enough experience to keep the servers up to date and configured as I need them. Anything else I will find a company to remote admin them if I need it.

I'll keep spare hardware here or in the DC for if anything fails. Maybe even a spare server or two.

What haven't I thought of?

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