Monthly Rentals in Vegas

[GTL]

Planning on heading to vegas for about a month during the series this year. I have seen a few websites that offer "penthouses" on the stip for around 5k a month. in that range they tend to be 2br with a living room, kitchen, and dining room. I'm not averse to getting a place off the strip and maybe renting a car. although I'm only 21 so I'm not sure if I'll be able to do that myself in vegas.

Anybody have info on a good place to look for vacation rentals?