What is the best long-term visa option for a retiree with a Thai daughter living in Australia?

Hi I'm staring down the barrel of retirement in Australia and would like to live in Thailand

I have a 6year old Thai daughter. Not with her mum anymore. But I support and pay for her every month and continue to do so

I am noted on the birth certificate as her dad but have not been to the family law court to have me recognized by Thai law.

It seems from what I read the retirement visa is becoming a little more difficult to obtain.

And I could get married again but I've been told marriage visas are troublesome

What is the best long term visa for me

Thanks