So if you make 25 unique droids (one for each dome), get 24 of them in 2-packs and 1 in a single pack - that will run you $240.35
And in my case, I'd want to get two of each unique droid.... bringing the total to $480.70.
I just checked Spirit Airlines and from Atlantic City, NJ -> Orlando, FL, the cheapest rate I can get is $84 one-way - which means that is $168 round-trip.
According to one site - a one-way taxi ride from the airport to WDW is $55, so that means renting a compact car for the day would probably be better, let's just figure $100 for that.
That means the grand total for getting these would be approximately $750 - $800 total - for 50 figures, which means $15 - $16 a droid.
Almost would be better to just drive the 17 hours, live out of the car, go to the park, drive back - maybe get a hotel one night just to shower. But even that I estimate will cost me roughly $220 in gas and that's with me taking my Prius.
The biggest thing that's stopping me is that what happens if you get there and they don't have all of the parts in stock? I can seriously see there being a run on R6, R8 and R9 domes as we speak.