Your only options are to carry on getting a dodgy extension from an agent or got to a Thai consulate outside of LOS and get a Multi 'O' .Some will give you an extension without showing money..like Savannakhet. The only other option is to get someone to lend you the money 2 months before your extension is due !!
Ananda Mello Costa It all depends on what time it arrives in Mukdahan .....if you don't get the 7.30 or 8.30 bus across the bridge you are cutting it fine to to get to the Consulate .Even though I can get a 3am bus from Surin I always get the 6pm and stay in a Hotel..The Buses are notorious for not running on time with late arrivals .But the choice is yours :)
Although the bus is a pain I would recommend you take one from Bangkok to Mukdahan that arrive during the day and stay in a Hotel for the night .There is an OK one in the top left-hand side of the bus station,( about 400 baht ) .You can then get up about 6.45, have some breakfast and take the first 7.30 bus across the bridge .I think the Hotel is called Submukda Phoomplace Hotel
Also get a New TM.6 as you leave Thailand , you can have filled in for your return and get through Thai Immigration whist others are filling in their's TM 6 ;)
Completed application form (with 2 passport photos attached)
1 copy of passport front page (photo page) signed by you.
Original marriage certificate (mine was Thai version).
1 copy of marriage certificate, front and back on single sheet of paper as it is on the original certificate, signed by wife.
Copy of wifes ID Card, front and back on single sheet of paper, signed by wife.
Copy of wifes house book (Tabien Bahn) signed by wife.
5,000 baht Non Immigrant ‘O’ Visa fee.
Got there a 8.45 ,3rd in the Que ......Handed in the paperwork and IO look at it all and handed back the Original marriage certificate .Pick it at 2pm the next day ...back home in Surin by 8pm