Hire a pro for best results. Professional equipment and products would clear out the crabgrass and weeds. Your guy should plant a turfgrass (like Bermuda), suitable to your climate and turfgrass use. Maybe Patriot is close to you.
But surely you jest. Soccer field on 5000 sqft? I hope you meant 50,000 sqft.
Irrigation, fertilizer and Bermuda grass can do a lot in a few weeks.
Do you plan to overseed with rye in the winter?