Now, money & time no object, that'd be easy (the choice <g>).
I really, honestly, I mean it, would get started on a 1/96 DD-554 USS Boyd. This was my dad's old ship, so it has meaning, and I have an eye-witness to fill in some details, too. I've even got the AFD plans of the Boyd (they just need to be sent off to an offshore scan-to-cad shop to be refurbished a bit--but hey, this is a price is no object supposition<g>).
I'd likely tour around the local museums to see what they want/need for some scaled ship dios. I know the GHWB Museum would like a carrier task force diorama, circa 44-45; they just don't have a handle on space v. cost (they really would like a 1/700 donated, I'm thinking, and might--just "might"--would buy a 1/1200). The Nimitz museum in Fredricksburg would love to have a scale "typical" TF to display; I know they'd really be happy with a scale CBG (with CVN-68, 'natch as the centerpiece) dio. Which would be cool to do, too, as the aircraft search radii could then have a larger scale a/c closer to the viewers (wouldn't that 1/32 A-7D look cool, "dirtied" up, hook down, on final ?)
The USS Kidd museum just over to Red Stick could stand some work, too. Be fun to be able to traipse about, putting things together with some organization and purpose.
Oh, and I'd just have to find a way to knock together all of my "rides." PBR Mk II, LCM-4, LCVP, not so hard. LCCB/LCP(L) a bit more work; likewise LCM-5 & ATC get to be some work. "County" class LST would be doable, as would USS Anchorage. The trickier part would be in not getting carried away and diorama-ing up stuff. Why build just the one PBR, when three make a proper "Ron" ? <g>
Hmm, would need an unlimited budget, I imagine--as I'd need a dedicated room for jsut building half of what I'd want. Then, I'd need a storage building for all the "stuff," before, during & after . . .