Jorge, thanks for posting the pictures, enjoyed seeing them. I'm heading down to Costa Rica next month and was just checking out the rental rates at the dealer in San Jose. I was surprised to see they charge more for a Buel than a Harley. 
Mark ..... I ride frequently in Costa Rica and have rented from Lifestyle HD several times. The reason for the Buell being more expensive is that a lot of US surfers rent them to ride to the West Coast and play on the beach with them. As you might guess many come back in serious condition if not on the back of a flatbed. Unless you make a reservation well in advance about the only thing you will find in the rental department is Sportsters. With some advance notice there are a couple of Road Kings on the program. There are also a couple of independents that have some nice bikes, but next month will be a tough time to rent one as all of the major marlin tournaments are cranking up.
When are you heading down? I'll be there the 2nd and 3rd weeks of January and possibly a 3 day turnaround in mid December. If the schedules happen to work out I'm buying grilled lobster, cerviche and numerous adult beverages at a little private club a friend owns.