For a company retreat, I'd suggest comparing minivan rentals with private transfers. Having a vehicle available throughout the trip could make group activities much easier, especially when everyone needs to arrive together. You can explore larger vehicle options at https://roscarphuket.com/van-and-minivan-rental-in-phuket/ and check which models suit your group. I'd recommend confirming seating capacity, luggage space, insurance, and whether a driver can be arranged. It's also worth planning meeting locations and sightseeing stops in advance. That should help everyone enjoy the trip without wasting time coordinating transportation.