@Ora ******
The Non OX for almost everyone was a Non-Starter for the sheer requirement of having 3 million baht in a Thai bank.
If you were applying from Sydney prior to them changing over to the evisa system then it was a No-brainer. They were the only consulate that didn’t require funds in Thailand and for $600 was a great option.
Now that they have switched to the evisa system I have no idea if they still offer the upgrade from the OA on application.