Help with getting to Marble Caves in Chile
 

Hi all - Can anyone help with getting to the Marble Caves? I plan to fly into Balmaceda from Santiago. I cannot find a car rental company (it says there are car rentals out of BBA airport, but nothing is available when I checked online). I am trying to get transportation to Puerto Rio Tranquilo or book a day trip to the Marble Caves from Balmaceda or Coyhaique. Can anyone direct me to car rentals or recommend a guide / tour company out of Balmaceda or Coyhaique? We are a group of 9 (6 adults, 3 children). Thank you!