That's a bit tight for Tarmac and all groundwork,edges etc. but times are hard and work is work. Employers gotta pay the boys. I would be very carefull about agreeing to that contract without making sure that they explain exactly what your getting we are here to help.
I would say 5.5k tops for that area, with clays or top end concrete pavers, cheaper for Gravel set in grid system with a block edging, or a combination of both.