Just some examples to see the prices

http://www.vrbo.com/vacation-rentals/usa/massachusetts

http://www.vrbo.com/vacation-rentals...rolina/coastal

being from MA, the Cape is a wonderful place. My family likes it out past the elbow, in Brewster, Orleans, Truro, Wellfleet, P-town because there is a lot more space than in Yarmouth, Hyannis, and Dennis and and we like the ocean. Others religiously return to Dennis/Harwich every year. The bay is for small kids imo, much warmer water and no surf, but make a nice way to relax. The ocean side is more scenic, nicer dunes, but you have to walk through them which can be a pain climbing up after the end of the day with two boogie boards, a cooler, several beach chairs, towels, and enough sunblock to ward away cancer forever, but body surfing Cahoon's Hollow or Nauset will give you a great workout and the water is only cold for a few minutes.

The Cape is heavily developed now, but there still exist places to hide out. Would love to try OB.