The locals embraced the GK so I don't see why they wouldn't do the same for the NBA, besides LV is a huge basketball town - just look at the Runnin Rebels (mores specifically during Tark's era but still).
Golden Knights had the advantage of being first to the market for one. Remember when Vegas was written off as a hockey market during the vagabond later days of the ECHL's Wranglers? There is also the situation that the Golden Knights were extremely good out of the gate which helped matters a ton.
My main concerns about the NBA in Vegas is that it would have a LOT of competition between the Golden Knights, Raiders, UNLV athletics, plus the scores of non-sports entertainment that exists in the city. Tourism helps but there's the truth that Vegas as a market where people live isn't as big as people make it out to be. And this is before MLS and MLB get involved!
Also, as I mentioned, in terms of TV territory Vegas would only probably be guaranteed the southern half of Nevada; in contrast the Golden Knights got most of the Intermountain west save Colorado. In terms of population and size that isn't much and would hinder any sort of big TV deal because the lack of eyeballs there. I see the Jazz/Suns/Lakers/Clippers/Sacramento Kings being a lot more protective of their TV territory than the LA Kings/Ducks/Coyotes/Avalanche were.
Do you want a repeat of 1970s Atlanta or 1990s Miami when a market grows too fast? Go to Vegas.
Personally, I think going for a Louisville or Kansas City would be a better move. Both have buildings even if UofL would raise a stink for the former and city government has done everything to inhibit a tenant for the latter.