Make a list (in order) of what needs to be done. Figure out whom you need to hire. Add to the list as it goes, as needed, of course.
As far as hiring contractors — I’d go for someone (probably one of the little guys) where I can speak to a principal sooner rather than later. If I get a secretary who takes my number, can’t speak intelligently about costs/work, and no one calls me back within 24 hours, it’s not worth it.