There’s been a lot of talk about the rising costs of a simple Las Vegas vacation. Over the years, Sin City has slowly lost its reputation for inexpensive travel. Gone are the days of the cheap buffets, and now there’s talk of hotel room rates going up again. But hey, that’s what happens when a city begins adding major attractions like the Grand Prix and Super Bowl, brings in professional sports teams, and builds world class venues like the Sphere. Our friends at Nerd Wallet recently took notice of these changes as well, and they were kind enough to put…