I brought cash, declared in to Oz customs, BKK Bank wanted paperwork which customs didn't give me. Apparently you can get paperwork from Australia though maybe online I'm not sure I can't remember
Also BKK would not accept a wise transfer as international
My understanding is you’ll have to register as a landlord yourself. I haven’t done this yet but will be in the same boat in the near future. I’m told the first time you’ll have to do it in person and that you can then register online to do TM 30s for whoever stays at your residence.