Thanks to all for the replies.
Dan, I'd kicked around the idea of something motorized and a track. We will eventually build a seawall and install a crane for bigger OD's (J22), but that is down the road. Representing the beach launched boats I wanted to make sure we didn't compromise expenditures on our end, to help them get going sooner (i.e. phased project/phased funding) and be disappointed for not "stretching" out and asking for all the proper room.