@Tony ***********
Now you're flirting in the "get a real visa, not live as a tourist" land. But there are some touristy ways to do it:
1. Multiple Entry Tourist Visa. You can stay in Thailand for 6 months on this visa. You can buy one in Perth, if I remember correctly.
2. Do the following:
a. Fly into Thailand (30 day visa exempt)
b. Border Bounce (30 day visa exempt)
c. Border Bounce (30 day visa exempt - don't forget you only get two).
d. Tourist Visa in Vientiane (60 days, I'd *expect* to be able to get 3 before they tell you no)
e. Tourist Visa in Savannakhet (60 days, another 3 before they tell you no)
That'll give you a total of 250 days.
HOWEVER... getting a visa does NOT give you automatic entry into Thailand. If they think you are working or can't support yourself, they can (and do) reject people from entering.