and yes that's about right what I did it was in country so I guess that could make a difference didn't want to confuse anyone just thought I would point it out
I'm came back on a visa free, then they had me extend that again by 30 days, then they had me do a 60 day visit thai family and then I finally got the Non O, but they wanted to see the 400k in my account for the whole 3 mths
although you're obviously right about the seasoning non requirement at first, I think this depends on the immigration office you visit, I just got my non O based on marriage and they asked for me to have the money in my account for 3 months before they would even consider giving me that Non O. Might be something to consider, don't know if you have ever come across this way much at all but this was my experience.
We just submitted all ours, but it's a chore I'm not going to lie, all in all is was over 100 pages that we handed in, we did it ourselves though as my Mrs worked for a visa company for last 7 years so knows a bit about it but it's all fairly straight forward stuff it just takes a bit of time to do it and get it all together I don't think you need to pay anyone
That price is insane to basically do an application for a non O or anything for that matter
If it's just actually to get married you just go your embassy get and affidavit to marry, get it translated, then go to local ampur and do it takes 15 mins