Air Asia always been good with me. Flown several times kop to bkk. Allow 7.3kg carry on plus 3kg shoulder bag every time. Thetpy drew the line at 7.9 kg so I had to put things back in the car. Prices have gone up a lot though.
Just go to immigration at any time and buy a re entry permit. You will need application form tm8 I think. The permit is valid until your extension stamp expires.
sorry to hear about your predicament but as a last ditch attempt to help you could I suggest you ring your office? Many have English speaking Officers.
Come in on 30 day Visa exempt and apply for additional 30 days from local immigration for 1900 baht. Or, apply for 60 day tourist Visa before you leave. Providing the country from which your passport is issued qualifies.
visa on arrival is a totaly different thing to Visa exempt and aimed at people with certain passports so allthough I dont agree with calling you names you are wrong.
I am not sure for the marriage extension but I believe you can spend the 400k. Another plan, which I am following, is to send back some or all of the 65k montly payments to the UK using Dee Money. They dont mind what you do with the monthly payment amounts they just have to show so you can also spend as much of them as you like. I know there will be transfer costs to consider but it might help your cash flow as you can use the same 65k for next month as you used last month. A friend did it for years.