Year 8 students don't need tutoring at all. I actually wouldn't recommend tutoring in year 8 because its not really useful. But if you want tutoring, I would suggest Dr. Du.
It's near Hurstville but I think it may be more than $13/h. 3 hours a week for year 8 is okay. Maybe a bit too much.
How...
English, try Ngo and Sons.
Science, try Peak. They are both relatively cheap and they're good tutoring centres near your region.
I am currently tutoring for maths at Ngo and Sons. A lot of pressure and negativity but all in all, an excellent tutoring place.