Im from NZ im going to apply for OA visa from here you get multiple entry plus you can get 2 years out of it if you do a border crossing.You can use your Aussie bank account.I wouldn't advise not having insurance like the O visa if something happens even catch covid it will cost you big time.After 2 years if you still enjoying Thailand you can swap to O visa.Only my opinion.
Usally i would agree with you but during these i think you be crazy not to take out insurance.Most of the time i ride my motorbike around in shorts n singlet.1 decent accident big money.Also if i catch covid big money.