Crow's in shock over everything
Nice! Fair warning though: Vegas is ridiculously expensive ^^; We were only able to afford it because we saved for a whole year and Hilton practically gave us our hotel for free (rooms here are normally $300-$800/night at the cheapest end). There are ways to make it more affordable, but quality entertainment is hundreds of dollars per person and most restaurants charge $20-30 per plate. Also, you need about $100/person to play in a casino for a fair amount of time, and if you don't make money by the end, then that's also expensive.
I think the best ways to make it cheaper are to stay in a hotel that's not close to the strip and eat at fast food restaurants instead of the ones in/around casinos. Also, even though shows are the most expensive thing you can do here, you should definitely go to one while you're there! They're part of the Vegas experience cx Cirque du Soleil is pricey, but there are other shows that aren't as bad if that one is out of your price range. (I still recommend Cirque though because it was worth every penny IMO)
Also, if you go to a casino, take advantage of the free drinks xD Drinks everywhere in Vegas are dirt cheap because they want people to get drunk so they'll spend more. I saw some places that had 99 cent drinks, others had 3 for $10, and of course, most casinos give them away for free. It's pretty awesome.
Hopefully you and your friends can go! It's so much fun ^^ Highly recommend