I do caution you that the game is very finicky with beach lots. For instance, a beach lot may only be used once and never binned for later placement. The swim option will no longer exist on a binned lot.
I do agree the game is very finicky with beach lots but I have never had any trouble binning and/or packaging my (I build my own) beach lots and re-using them. They continue to work as they should with swimming and everything. I have re-used them in numerous hoods since BV was released.