Sorry if this has been asked before, but need a little help, and if you can please in simpel english if possible

I'll try go this road now the double and trible TV is history and since the Thai Embassy in Dk isn't so helpfull I try and ask the qustion here.
Me and my wife is legally married in Thailand and it's clarified in DK,so all good so far I hope
This time I only need a single visa which should give me 90 day.
I just read on another thread that Lommou was speaking about a 60 days extension,is that possible and do you need to leave the country and how much is it ?
Thai Embassy in Dk say I must bring a bank statement that show that I can take care myself, but don't mention any amount,to show in the airport imm.when I arrive,how much and is a copy off my bankbook enough or do I need something special from my bank ?
Do I need something from my work which is no problem if needed ?
Thanks in advance and see you in december



