You could have a Hotel in the middle of the desert shaped like a giant landed Star Destroyer.
The Hotel would be a Hotel and casino--that would be Star Wars themed and inspired. At the time of my idea they didn't have Star Wars slots yet but now they do. (so bring on the slots)
You could have Sabaac the gambling game in the Star Wars Books.
Behind the Hotel would be a Theme Park. Laid out like Disneyland with Mos Eisley as Main Street and shops and the Mos Eisley Cantina (of course the animatronic Bith Band like that seen in this picture I took at FAP Swartz Toy Store in Caesar's Palace years ago. would be perfect.
Landspeeder rides down Mos Eisley instead of the fire trucks on Main Street.
Off one side street of Mos Eisley would be the Jabba's Palace Lunch and dinner show.
For lunch and dinner --you would eat in Jabba's palace with Giant Animatronic Jabba overlooking the lunch and dinner show that could include all sorts of Star Wars themed entertainment al la dinner shows like Wild Bill's or Medieval Times. With Twilek servers and cool characters walking around. One part of the show would be Bossh walking in with Chewie like scene from movie and Hologram Luke scene from movie as well.
Since it is Vegas they could even have a late night Adult only late night show as well with Topless slave dancers --and Slave Leia.
(since I first wrote this years ago Star Wars Burlesque is something I've been to in Los Angeles.)
The Central Hub would instead of a castle be a giant Star Tours facility that would transport people to the other Planets (or lands if you will) --There would be of course walk by entrances for those not wishing to take the Star Tours Type rides to different destinations.
One Star Tours ride would drop you off at the Death Star. A Large Building connected to the Star Tours Facility . This 3 story building would house Death Star Laser Tag