either Singapore or Malaysia airlines they leave 1 hour apart on a Wednesday morning, sadly no flights go direct. There are scoot flights in the evening with stop over in Singapore its not to bad a flight.
can apply just using your salary, that's what I submitted. Go via Sydney consulate NOT Canberra site. Also don't need thai bank account, I have one but did not declare it.
I have been doing 2 and 2 fifo into Thailand for years and never been stopped and questioned. I have always had return flights booked so that may have helped. I decided May 2022 to obtain the OX visa to avoid being stopped as many stories of people being question when entering so often like i was.