i am a 1 man band and have been since i started in 1999 and never needed to outsource.
I offer 24/7 support, which can be achieved through a good Knowledgebase, tutorials, ticket system.
as all 24/7 support mean is that you have some sort of support available 24/7. a KB and tutorials are forms of self help support.
you then have 24/7 Live support which means you have a person available 24/7, which is impossible for a 1 man band.
I am available live from 9am til midnight 7 days a week, although that does not mean if a client contacts me at 11.58PM i will leave them at 12 midnight, i will stay until they are happy. I have seen me working with a client until 3 am. In my early days the longest i worked straight through was approx. 74 hrs.