This will changes as reputation of the shop changes. You can't expect a company to fork over that kind of money only to have nothing done.
- Friday night: Plan and agree on approach
- Saturday morning to Sunday night: hack
- 4-5hrs sleep/night + breaks and tomfoolery
Maybe getting 35 hours of actual solid work comes out to $200-$228/hr. $2k-3k would be way too low esp. after taxes unless there is a way to skirt the IRS.