It is the buyer who should arrange the inspection.
If she's a friend, you may have a uncomfortable situation. Basically you are telling her she isn't worth her pay check. Be careful, only you know how her and how she will react.
Since you already have a buyer, you are probably better off investing that money in a good real estate attorney.
Back to your friend, will yu be buying another house? Why not package the deal and say we'll use you to buy the next one, I've already sold this home, help us with the paperwork process for $X%