We use a Seawise davit system for a similar dinghy. It does not block the swim grid even with the dinghy on the boat, but you do have to exit the swim grid on one side only. We dock almost exclusively starboard side tie, so the column is mounted on the port side of the swim grid leaving the starboard side completely open. The dinghy is mounted on it's side eliminating any rain water filling. They come in manual or motorized. Ours is manual, and it is easy and takes only about a minute to launch and retrieve. Our boat came with it, but I understand, like a lot of boat items, it is not cheap.
We are happy with ours.