I have signed up for Ironman WA Busselton which will be held on 7 Dec 2008.
By chance I read in the star of "free tickets" being offered to Perth for two days. So I booked two tickets (leaving on the 3rd and coming back on the 13th). The "free" tickets actually cost RM 2,400 return for two.
Then I signed up. Add carbo and awards dinner tickets for the wife, entry fee was AUS 710. Thats already about RM4,600 and counting.
This is a very good site to get all sorts of tourist information :
Very simple accomodation is about AUS 90/day. So far I have identified two places (Eco Park something and Paradise Motor Inn)
Add a hard bicycle case, a swim wet suit, that "free" ticket to Perth is very $$$$$$$$$$$$$.