My advice is to phone the Canberra consulate for a start get on there web site as you are married to a Thai get a marriage visa and being close to Canberra try to make an appointment when you start the process if you are looking at moving to Thailand in a years time thing will have possibly changed by then I have a Thai partner we have been waiting in Brisbane for the past few months for things to change so we can return we are not married so that is why I am applying for a retirement visa
I have been in contact with Brisbane and Canberra consulates no sign of STV visa you can apply for TR tourist 60 day I am in the process of applying for retirement visa and yes I have got exemption to leave Aus