The quote we received for a double aluminium door is well over our budget (6k including installation and glass)
That price is crazy IMO.
I had a set of exterior french doors made by a joiner recently. Doors are cedar with double-glazed inserts, large SS parliament hinges (so that doors can be opened out flat). The frames are very deep (260mm or so) heart rimu.
Cost for those expensive doors was about $4500. Mass produced standard doors should be much cheaper.
Either you are being had on - or there's another complication - possibly structural building work required to widen the doorway, which might involve building consent and design fees.
Our door size is not standard (2.1x0.91m) so its a custom made aluminium door.
I am getting a quote from a pvc company this Sunday. Will see how much it will cost. Custom made Fibreglass is 3.5k excluding install and painting.