don't use hair straightener, hot air from air dryer has not to kick the skin head( don't dry the first 5 cm), use pure soap for clean hair and massage the base of hair very fine to improve oxygenation, if she use an hat must be breathable.
how to buy Thai government bonds and are they accepted by immigration? they yield between 2.3% and 3.5% but probably investing just 800K will not compensate the cost of a trading account.
go to bank with your wife and her tabian ban(blue book) and try to open it again, don't speak let your wife handle that for you(worked for me), don't give up after the first red signal just change bank or branch and try again.
for this kind of visa you should start with a non-o visa from your resident country and not by a visa exempt.