This is the place to leave any natural vegetation that may have been on the property. The drought tolerant zone will contain the plants that only need to be watered when there has been no rain for about 7 to 10 days. Mulching cools soil in the summer and warms it in the winter. It soaks up moisture and prevents evaporation and soil erosion. Florida does have a dry period, usually September through June, and the soil can be dry and sandy.
Rain tends to run off without soaking in, with the exception of mulched areas.
Non-porous 'hardscapes' tend to let water run off into the sewers and storm drains. Consider wood decking or gravel instead of concrete patios. Besides drought tolerance, the amount of required light, shade, and soil requirements must be taken into account. Shade trees in Florida are a must. Using native plants that have adapted to our environment can be key to a successful landscaping plan.