Replacing a window with a sliding door cost?

Hey guys im buying a house that was built by metricon and was wondering rough costing on replacing this 3m wide window with a stacker sliding door the same size. This property has a large side yard and i feel is wasted with a window. Ill be moving into the property in about 2 weeks so just trying to get a budget and recommendations on door brands. Located on the Goldcoast

This window is only 1534 above your floor, so you need another 600 above the window to give a reasonable door height, It appears that this window has a lintel supporting bricks (looking at weep-holes). So you need to have a lintel moved or installed that will add some cost.

im hoping we can reuse the lintel and just move it to the correct height. Ive priced up the door and prices range from about 1500-2500.

Sounds like a plan!