i'm a bit brain fried right now but are you being sarcastic? typing out apt-get install postgresql is a lot less that 15-30min.

Yes, but setting up e.g. users and pg_hba might be something you would need to research before doing your first postgres deployment even if you previously came from a managed postgres service. Also coming up some sort of backup strategy would be a good idea.

But once you know these things, you could of course be faster.