Look on vrbo.com, vacationrentals.com, etc, etc.
look at reservekosher.com
Unless you need a kosher home/don't want to use a self-cleaning oven you'll get much much better bang for your buck on vrbo type sites for a non-kosher home.
it depends on the size of your family.i have looked many times on vrbo sites and have not found better prices espcially considering that there is only one bed in each room on average.also if u need a private pool its pretty hard to find on those sites for a decent price