Vegas is a tough scene, there are however a few options that sort of resembles the organized scene in tor or montreal.
Also a recent law in US passed limiting ads for sex online. Several monger forums have gone dark in the US. The one i am member of in LA is drastically altering their TOS and rules to reflect these rules and to keep the site going.
That being said.
There are casino walkers - go to the bar in the middle of casino in planet hollywood, theres always something there but not necessarily what you are looking for.
I know 1 kgirl outfit in vegas been there once, i think it was 400 for the hour.
my site has a vegas forum. Pm me if you want more info about that.
Ranch will be expensive and outside clark county. You will have to go to pahrump for the nearest bunny ranch. About 80 miles.
Or just pick up chicks at bars like the others said here. Or save for montreal, i wish i was back in yyz.. its easier there for this hobby.