no she can't. That's the issue. This part is refering to the trailing spouse
'f you wish to be accompanied by spouse, the marriage certificate will be attached. But your spouse will be granted Non-Immigrant “O” instead of “O-A”(Long Stay)
Dan Hunt that average 'rule' is for people working here and using tax receipts as proof of income. It isn't to be used for foreign income into a Thai bank account. That has to be a minimum of 40k a month, every month for 12 months.
take a free tip. DO NOT alter or attempt to remove anything written or otherwise in your passport, unless you want to be in a whole world of hurt and be here longer than you may want to be, when it's found out.