Trip to Perth (Australia)

If you are going to buy a 5-day 2-night package ticket, you have the time to join ONLY a 1-day local tour.
You can only join a 3-day tour if you stay in Perth for more than 5 days. However, these tours are not so popular to people from HK and there may not be such tours during the time you are at Perth.
Most people who go to Perth by themselves book the local tours only on arrival.
For example, you can always book a Tuesday tour on Monday.
There may be Chinese tours to the Wave Rock or the Pinnacles. You can check it at http://www.aubest.com/big5/dp/dp-6/wa/index.htm
Once again may I remind you to book the tours only on arrival. (Don't worry, there will not be too many people. Last time when I went to the Wave Rock, there were only 4 people in the group.)
The Wave Rock tour is a one day tour. The travel agent picks you up at you hotel at about 7am and brings you back at around 5 pm. This tour costs about Au. $150 per adult, and about Au. $75 per child. (includes sandwiches as lunch)

Please tell me the number of days you are going to stay at Perth, and whether you are going to buy the 5-day 2-night package ticket or not, so that I can give you a rough estimation of the total travelling expenses.