Yeah I actually am making a trip out to Ubon Ratchathani so I think I'm just going to do a overnight border run to Pakse. Visa on Arrival is 2000 baht, so thats the same as the extension. Only a little more for a hotel/transport/food.
Yeah the main immigration office division 1 is about an hour away, and just based on my first experience there for the 90 day report, it was a long day. I tried calling multiple times throughout the day but no answer.