Hi Ian,
Although I live in Palm Coast (33 miles north of Daytona Beach), I have worked for Daytona Beach Shores PD for the last twenty years, retiring two weeks ago, and I know Daytona Beach VERY well. I agree with everything everyone has posted above, but Daytona Beach has been in redevelopment the last several years and is much better than what it was in the 1980's and 1990's. If I was going to buy a condo in the Daytona area, I personally would buy one in Daytona Beach Shores. Daytona Beach Shores is a separate city on the beachside, immediately south of Daytona Beach. The beaches are a bit nicer, as are the condos with quite a few new ones just being built. You didn't say if you were buying a condo outright or if you are buying a timeshare. If you are buying one outright, take a close look at the yearly taxes. Depending on the condo value, some owners are paying $7000.00 a year or more in property taxes for a three bedroom condo. You will definitely pay to live on the beach. To give you an example, I own a seven bedroom home with an in ground pool that was built in 1989, one mile west of the beach in Palm Coast, and my property taxes for 2009 are $1900.00. Triple or quadruple the taxes if I lived beachside here. Also, monthly maintenance fees can be high, depending on the condo. You are, however, in a great bargaining postion as condos here are definitely not selling the way they were for the last several years. Condo prices have fallen drastically, and they are crying for buyers. If you do decide to buy here, contact Doug Cook of Cook Development in Daytona Beach Shores and tell him Sergeant Lewis, Daytona Beach Shores Public Safety, sent you. I know Doug fairly well, and he will definitely work a deal for you. And no, I don't get a commission!
As far as metal detecting on the beaches, there are no restrictions that I am aware of and you are free to detect away at your pleasure.
If I can be of any more help, ask away!
P.S. I am from South Haven, Michigan, and want to move back your way eventually.