The recommendation is of course to fly direct into Cozumel (CZM), the condo is a 3-4 minute drive from the terminal.

However, from Cancun airport you just step out of the terminal and walk about half a block to the station and take a bus to Playa del Carmen, it is a 50 minute ride, buses leave every 20 minutes, $8/person. You can also take a van right at the curb for about $130.

Then from Playa bus station to the ferry terminal is a 1-2 block walk, even if you take a van you still have to walk to the ferry terminal, plenty of help is available for a $3-$4 tip. Ferries leave every other hour for Cozumel, $13/person, again a 50 minute ride, nice and comfortable. Once in Cozumel you take a cab to the condo, another 5 minute ride for $5-$6.