Who are your customers?

Locate where they gather, and go meet them. Maybe small enterprises, which you could meet during a trade fair?

Which pain are you trying to fix? If it is "just having an online presence", then FB already solve it.

FB is good enough for a lot of people seeking online presence. It's even mandatory for some to be there, regardless than the existence of a real website. So a lot of people make to choice of "just FB" instead of "FB + website" (when "website only" is not seen as an option).