Understand that immigration stereotypes and profiles. They modify these all the time, as new repeated abuse, and questionable loopholes are discovered being used.
the seven days is misleading. If you were to go to immigration trying to get a second extension, they will refuse you, and maybe let you get a 7 days to leave Thailand stamp, but it is not automatic. They can, and do refuse it.
here's a little hack most aren't aware of. Wait to renew it until one day after it expires. Don't panic it is only a bt10 fine. What this will do is give you a six year license, minus one day. Your expire date is on your birthday, and they do not date your new license from the date it expired. They date the five year expire date from your next birthday, and you get the extra days. I renewed mine last year one day after it expired, and got six year renewal date minus one day. You can renew your license up to one year after it expires, with just a small fine, and the next renewal date is figured from your next birthday, not the one it expired on. Not many people know this. If you renewed it a month late, it would be six years minus that one month, etc.
yes, that is the same. It makes the whole process easier if you get your type O visa based on retirement before you come to Thailand. This visa makes it very easy to open a Thai bank account by yourself, and not paying an agent bt5k-7k to open one. Bangkok Bank, Kasikorn Bank, or SCB, are the best, with no restrictions on the amounts transferred into the account in one transaction. You get your bank account, then make a SWIFT transfers from your Australian bank of the bt800,000. As soon as it's been in your account for two months you can apply for your one year extension, except in a very few places that won't take the application until you've got less than 7 days on your entry stamp. Bangkok is nice to get everything taken care of the first time, as they follow their rules. As a side note I believe she will need bt500,000 in her Thai bank account for the guardian visa