Thats 1000 sq. ft. If you choose to take the job this is 1 idea of how it should go.
THE BID $350.00
1. rent a tiller (if you dont have one)
2. till the area
3. hand prep removing any stones and debris
4. install seed with broadcast spreader.
5. I know she wants Bluegrass but you might want to buy a mix. For example....Mixes with rye (an annual grass) show signs of growth alot faster than Bluegrass alone. The rye dyes off awile anyway.