My buddies and I would like to go to Florida this June for a week.  I'm a scuba diver, and they like to snorkel and hang out on the beach.  However, all the beachside hotel and motel prices are atrocious- $125 to $150 a night.
How can we spend a week in Florida relatively cheapy?  When I went to the beach in Wilmington NC, I saw multiple motels within a few hundred yards of the beach for $35-40.  Are there any like this in Florida?