In my opinion - no. It wasn't an option that any of the four would have taken. The importance of being seen to be legal still figured in their mindsets. This meant that once acclaimed Emperor, a march on Rome was required, and a ratification by the cowered senate. None would have been content to establish some province as their capital, Galba could have tried in Spain, Vespasian could have done it in Judea, but no, the fight was for Empire, not part of it.