There is no Budget counter inside Chiang Mai Airport. The rental form didn't have an address, so after asking multiple times, we learned we needed to take a taxi to the company to pick up the car. When we arrived, the staff said they had sent someone to pick us up. This arrangement was a bit confusing, but everything else was satisfactory. The car was very new, the air conditioning was excellent, and they even allowed us to extend our return time. Extremely satisfied!