1) Gold Coast八月水溫大約21.7度,我估都好視乎你去玩果間野比件咩wetsuit你著。我之前去潛水用3mm的話22度水都凍到仆街
不過Jetboat可能會好過jet ski, jet ski長期濕身會凍d
2) Sydney 4-5日應該剛剛好去晒d景點:一日Blue Mountain,1-2日CBD (The Rocks + Opera House + Harbour Bridge),一日Bondi Beach,剩低可以去下其家Regional NSW Day Tour - Port Stephen滑沙 / Hunter Valley etc,都可以考慮去Snowy Mountain滑雪
Harbour Bridge Climb我上過,其實都真係為打一次卡,成個experience都幾無聊(個人認為)
因為d欄杆好高,唔似其他係摩天大廈出面行咁剌激
3) 食飯我無好刻意限自己budget, 不過我通常都係咁安排:
早餐:去Supermarket買定d菇呀蛋呀火腿咁,喺Airbnb食唔洗幾多錢
Lunch:通常都趁天氣好可以影相就食貴少少, average A$30-50一個人,最貴果餐喺Sydney睇住Opera House食lunch就A$120
晚上:因為兩老都攰所以都有幾餐係煮飯,煮得餐數越多越平
P.S. 八月唔係Peak Season