I am not exactly sure for teachers and if there is a difference between government schools and private independent schools. I know it's definitely 55 for nursing as my partner is a nurse. Maybe try posting this question to other expat groups?
I am not sure that what she means. In thailand they have fixed retirement age for government workers, nursing is 55 for example then you have to retire whether you want to or not. I think she is asking is there something similar for teaching in thailand?
you must bring money into thailand to pay for rent or hotel and food and transport? If you bring cash from your own country or Vietnam to use to live in thailand that is classed as bringing money into thailand and may be assessable
thai taxes are based on length of time in country I.e. over 180 days and then all about what you remit into the country and whether the money you bring in is assessable.
The thai banks don't open accounts for visitors I.e. tourist visa 's or visa exempt etc. As you are not going to be a permanent resident. The long term visa's demonstrate you have intentions to stay i.e the O visa ( in country or from your own country through the thai embassy). So to get a bank account without using a workaround ( an agent) its best to come with an O visa or an O-A visa ( or others) from your own country ready prepared. The reason why you need money in a thai bank account is to show you have funds in a local account should you need it in an emergency ( no health insurance requirements with an O extension in country)