Common misconception regarding Vegas: warm year round. It's not. Mid November through mid March is down right cold. Not Minnesota cold but freezing for us locals. Hell, a couple of years ago we had 8 inches of snow. Highs in the 50's, night time lows in the 30's are normal.
If you can wait April and May are great. 80's to 90's.
To answer your question though, we have a couple of rentals that go for $1400 - $1600. Thats with a pool but long term and not furnished in the suburbs. Both rented but giving you a basic idea. If you want furnished on the strip I would go with a condo but that will set you back a lot more, especially short term on a monthly basis. There are some pretty cool furnished mid century modern 'old Vegas' style places you can rent in the $2k area but the neighborhoods can be dicey. Then you can go high end in the suburbs (Ridges, Anthem, MacDonald Highlands) and get a furnished 5k sq. ft home for $4k to $10k per month.
Of course with a little searching you can always find deals and work out something directly with owners. Good Luck.
