I think comparing the use of contractors to the use of cloud services is pretty disingenuous in this context.
The reason that "one-person company" is emphasized in the title is because people will expect to find a list of technologies that make developing and maintaining all of the tech required to run a company do-able for a single person.
Advice about which cloud services to use is exactly what I would expect to find on such a list. Hiring external developers is exactly the opposite of what I would expect to see, and kind of undermines the premise.
UI design is for an artist, not a developer. I can build whatever someone wants with the same stack that the OP is using (Django, Postgres, Lucene-ish search db, etc), but I will freely admit to people that I suck at website design in the way that they think of website design (what it looks like). Bootstrap was made for dolts like me who don't know what buttons and forms are supposed to look like.
Is it cheating to hire an artist to design the front facing site components?
The reason that "one-person company" is emphasized in the title is because people will expect to find a list of technologies that make developing and maintaining all of the tech required to run a company do-able for a single person.
Advice about which cloud services to use is exactly what I would expect to find on such a list. Hiring external developers is exactly the opposite of what I would expect to see, and kind of undermines the premise.