Not that crazy about having an NHL team in Nevada. They could probably afford it with all the casinos buying up tickets and boxes but the average person in LV probably can't.
In 2010, The median income for a household in the city was $53,000 and the median income for a family was $58,465. Males had a median income of $35,511 versus $27,554 for females. The per capita income for the city was $22,060.
http://en.wikipedia.org/wiki/Las_Vegas
Plus their total population is only about 600,000
Their permanent fan base will probably be next to non-existent. More than likely if the Flames play there you'll probably see more Flames jerseys in the stands that LV jerseys.
Moneywise it might make sense, but that's the only reason I can see.