I know being the edgy you-don't-have-big-data guy is all the rage right now, but seriously? Most people can fit all of their work on one server? What kind of mom-and-pop shops are you working for?
I started JohnCompanies in summer/fall 2001, which was the first VPS provider. This was a fairly significant financial gamble that most people can fit all their work on even less than one server.
Many, many people believe this is true for them.
Most of them are wrong.