Of course another problem is that even if it were tactically sound to pile all your ships in one place (Battleship Row anyone? and just across the water from the reborn Russian Air Force and Navy?), then the cost would be prohibitive to the US.
The United States is entering an economic downturn, owing to the continued outsourcing of manufacturing to Asia, and the continued importing of goods from China et al, which are flooding the country and devastating its indigenous industrial base. Couple that with the economic growth of China and Russia, and you have a Navy that cannot afford to keep pace and spend money on ambitious and vastly expensive undertakings such as a huge new Naval base.
The US military planners are already struggling to afford replacement equipment for all the Cold War stuff that is wearing out, and they are being told they must make do with far less numbers than they had previously had, in both men and materiel. And all this whilst being asked to fight two wars, plus maintain other commitments around the globe, all of which wears stuff out even quicker as less ships and aeroplanes do more work. Technological solutions cannot provide all the answers to these problems either. Granted, a shiny new F-35 may be able to conduct multi-role operations, but the five aircraft it replaces could be in five different places around the world, and as good as the F-35 may be, it can only be in one place at a time. Where, as noted, its airframe will be wearing out at five times the rate an older aircraft would have, because it will be doing a lot more work! Which means it will then cost even more money - money that the US simply does not have.
I'm sure the US Navy would love the kind of budget that would allow it to contemplate such possibilities as a massive shiny new Naval base, but it hasn't, so the question becomes academic really.
Chock