how much would it cost to get a PVC porch - with an aluminium door?

[riddles]

Hi,

I'm wondering how much it would cost to get a PVC porch - with an aluminium door. I think the porch is 10 feet by 3 but walled on one side.
I got one quote of 1000€ to build up the step and a then 3K for the porch itself.

Thanks,