I´m not sure if I received an email from the hotel offering airport pickup for 3.000 baht or if I read it here, but I took a taxi for 1.200 baht. I thought I was going to take a taxi back, but the hotel offered a transfer on their SUV for just 1.500 baht, which I thought was totally worth it, being both more comfortable and convenient.
So I´m not sure if that 3.000 baht price is the price for the airport-hotel transfer or if it included both ways.
BTW, I published a review here. Fantastic property.