Every installation is different. Therefore, it is impossible to give a price without a site inspection. As a very rough guide, full supply and installation might cost between $60-$80 per square metre. Smaller jobs may cost more than this per square metre.
Installation might include machine or manual excavation. Access to the area and quantity to be removed will need to be considered. For installation of your artificial grass over sand, you will need a cracker dust substrate. The Cracker dust is screeded or contoured to your area and compacted with a plate compactor. Finally, along with the artificial grass, you may need turf pegs, joining tape and artificial grass infill sand (kiln-dried silica).
You may also need to consider the installation of garden edging and borders if there are none already in place around your area.