Re: "floating barge"
One problem is that SpaceX have got launch facilities at Kennedy Space Centre, so they're a bit lacking in huge, flat expanses of desert to bring the rockets down in. If the worst comes to the worst and they can't land on the barge, I'm sure that won't be a problem. So long as they can prove that they can hover over a defined space with a very high degree of accuracy, they can always leave the difficult landing bit until the FAA certify them to attempt it on dry land.
Biting the hand that feeds IT
