again never been asked but they can ask for proof of 20,000baht or equivalent in your own currency. I always have at least 1000aud on me. Cards get lower rate and $9 fee every time withdraw cash.
Australians don't need a visa currently for as I explained 60 days can enter visa exempt.
MTV is multiple entry tourist visa, every time you enter during the 6 months it's valid for you get 60 days plus can extend. Even enter the day before it expires you get the 60 days
I looked at profile. Said NSW that's why I replied saying You go through Sydney addressing the poster. But yes no harm to warn others, they will soon read it on the web site as well if they don't they will be rejected I guess.
You go through Sydney Thai consulate and apply online. Remember the visa starts the day it's issued so don't apply to soon or you eat into the 6 months valid time
Currently you can enter visa exempt for 60 days extend once only extra 30 days then zip across the border come back into Thailand and do same again that would give you 180 days. But the 60 could go back to 30 days entry stamp. MTV gives you the 60 days each time you enter plus 30 days extend is available each time as well