Cherry hill - many cheap options for hotels for your company. Close to phl, and has activites for your coworkers.
Has a few shuls, and a small kosher mini market, but your kosher takeout options are limited and in philly proper.
North miami - near fll and mia, a little more expensive for the hotels but you can probably find something more north (it's the start of hurricane season so should be cheaper than rest of year) Many kosher food options and shuls.