you don't need 2 months 800 K in bank when you apply for non o Same day is ok but it has to stay 3 months or more after ( 3 months after year extension from non o )
the same First you apply for non o, ( 3 months ) after 2-3 months you can extend that for 1 year 400.000 for marriage or 800.000 retirement In that period that money has to stay After 3 months, in case of retirement, you can go to 400.000 and if you want to extend after one year again, the 800.000 has to be in the account for 2 or 3 months that im not sure, before the day you want to extend
I don't know where you did it or where you have the information I'm 100 % sure that the money has to be in your account the day you change tourist visa or exemption into non o Then it has to stay untill you apply for the 1 year extension, 2-3 months later
You could also take a very cheap insurance, starts around 9.000 thb a year if I'm not wrong ( with high deductible of about 200.000 thb with OP cover that qualifies for the non OA but in fact is useless ) and take another good insurance to use for real need Then you can keep the non OA without the 800.000 in account. Or switch tot non o as said before For the cheap oa insurance, and all others you can take a look at
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They have offices in Phuket, Hua Hun, BKK and Pattaya