If you decide to take the plunge, I'd suggest a couple of things.
Before you leave find a real estate agent, in the future you may want to rent / sell your house so having someone you know will make it easier to do from Thailand. I sold my house while living in Singapore and it was hassle free.
Don't ditch your health cover, suspend it. Your probably aware, but (at least when I did it) my health fund categorised me as "non active" for 2 years, so if I returned to Australia I could rejoin and not have waiting periods etc. Costs you nothing but well worth it if you decide you don't like it here and return to Oz.
If you live in Thailand your main Australian residence will only be tax free if you sell it for 7 years, so if you keep your house more than 7 years you'll have capital gains tax to pay.
Get some tax advice. In my case my accountant informed the ATO that this would be my last tax return and I would be a non resident for tax purposes. My bank accounts automatically take 10% tax from interest. Any capital gains I make in the stock market are tax free. Housing / rent is taxable even as a non resident.
Things may have changed. I retired at 50 and have been here 8 years, so best to check.