Frankly they are getting tougher to find. Several of the cities around Vegas have outlawed short term rentals in residential areas because the renters would party the whole time and disrupt the neighborhood. Also HOAs have banned short term rentals like that for the same reason. If you need a larger than standard hotel room you should check out timeshares in Vegas. They are renting their units like hotel rooms but are actually one, two and three bedroom apartments. You can get a real deal on them right now.
You can check out this site as they include timeshares in the hotel rentals and you will see what I mean.