There wouldn't be many hotter days to be doing this in Queensland. All the best!
The ride is technically called a Bun Burner 2500 (BB2500) and is easier than the SS2000 because you have the extra 12 hours to get those 500 kays. Still a worthy challenge, especially with the heat. But riding through the night in summer is fantastic. Just a pity the nights are shorter and the daylight longer.