It might be possible to have a delivery skipper and crew bring the yacht up the Chilean or Argentinean coast to a large port where the boat could be put on a ship for further transport -- that might be less expensive and less wear and tear than having the delivery crew get it all the way to you or to a major market. You might also check out the specialized yacht delivery ships and which South American ports they might visit.
Edit: Dockwise Transport's site doesn't show a regular pick-up/delivery location closer than Golfito, Costa Rica, so that option doesn't look useful to you.
Edit: Dockwise Transport's site doesn't show a regular pick-up/delivery location closer than Golfito, Costa Rica, so that option doesn't look useful to you.
