There are a lot of cheap hotels in Las Vegas however to save you on transport costs and time, you want to stay in centrally on the Las Vegas strip. Mid week rates tend to be a lot cheaper than weekends.
Most hotels charge a daily resort fee which can be anywhere from $15 to $35 per day. Remember to include this in total costs when comparing hotel prices.
Resort credit can be used toward bars & restaurants.
Check out LMTClub for good discounts on tours. MyVegas offers coupons for events.
You can find coupons and vouchers at most hotel receptions. You can also check eBay for some deals.