L.G.
i think $50 per day sounds pretty reasonable for an 8 hour day. if it's any longer, i would go up to $60. I wouldn't let the hourly rate go down below $6 for sure, and if you have her at other times, for short periods, i would raise the hourly rate to $8/hour at least (for example, you go out for the evening). Either way, ask her what she has in mind, or tell her your rate and ask if that's acceptable to her.