Yeah. Fast track at the Airport, tip for driver 200 baht. Change a couple days expenses at the Airport to get by, then you’ll find money exchange out in town that give a better rate.
Do it Monday. Get there before it opens. It’s like DMV. Bring your resident form TM 30 from hotel or apartment. Also bring a passport photo and your passport. In the back of the line is a table with the form fill it out and get in line. At the front of the line hand your paperwork to the girl. She will use a glue stick to put your photo on the paperwork you just filled out. She will give you a plastic number. Go to the next area that has seats. Wait until your number is called and go in another office with about 10 seats, they will call you to a window. Hand them the passport and paperwork that was already assembled by the girl in the first line. Pay them 1900 baht in cash. Go outside and sit again, make jokes with the guy from Kuwait about car-pit bom-bing his country. He will laugh. Soon they announce to go to the table and a girl will handout about 5 passports. If you’re late expect them to close entirely for lunch. Don’t be late. Your passport will add 31 days to your previous exit date. Good luck.
the agent you hire in Thailand will print and hand carry your shit to immigration. He will grease it and fast track it. While you’re wandering around Korea picking your nose. They have ways.