How much? - Bitumen macadam

[sdlltd]

Morning,
Firstly I'm new to this and want to say what a top site.
I sent an email yesterday, with a question, but it got returned last night (undeliverable).

So, I wonder if anyone can help me.
We are trying to get a average price for Tarmacing our car park.
a) We have a grass section 600sqm that needs to be done and
b) I've been told the best way to spruce up the rest of the car park, 1200sqm, is an'overlay'. Is this a recongised method, or is it just cutting corners.
We have had a price range from 10k to 35k for the 600sqm section
and 9k to 15k for the overlay.

They seem miles from each other, so were none the wiser!!
It's a clear open car park, in Essex, that I've been told is quite a straight forward job for a credible company.
We can't seem to get a sensible quote.

Any thoughts?

[Tony McC]

I've already answered this question by email, so your email must have got through!