@GM ********
originally I provided an invoice copy and a cover letting explaining my work etc (basic social media and talent management stuff) I explicitly stated I have no Thai clients, will not employ Thai people etc.
I used bank statements from my business bank account which had my trading name as well as personal name since I was the sole owner of the account and it had income etc as well as the 500k equivalent.
They requested my business registration so I sent an official ABN letter (from the government site) which had my name and business details etc.
They then requested updated bank statements a few hours later, possibly because it had been a week since my last statement I'm unsure.
I had moved funds to revolut to prepare for travel so I sent an official account confirmation letter (in revolut settings) + statements for last few months + cover letter explaining why I'd moved funds to that account and how this was a personal account now in case that helped. I used ChatGPT to make the wording appropriate and structured.
2 days later it was pending approval and approved later that day :) hope this helps.
I'm unsure for NSW because Sydney have a different consulate if you're from there