@Paul ********
you need to go to the Sydney Thai Consulate Website and see if you can meet the requirements for the 10 year OX visa.
The visa gives you a 5 year entry stamp and is unlimited entry for the validity (10 years from the date of issue)
That consulate is the ONLY ONE in the world with the requirements set as low as they are. If you can meet them and get that visa you're in good shape.. A LOT of Auzzies have gotten off their retirement visas (from inside thailand and gotten that OX visa from Sydney. You apply online, get the approval, then mail the application, documentation, passport and include return postage paid envelope and they send the passport with the visa back to your address in Oz..
It's the way to go IF you can qualify for it.