Zappy,
I knew your mind was all ready made up. And it's your call.
I would suggest you go back and re-read your initial post tho' because what I see is that you have alot of plans and shoulds and musts for her and it sounds more like what we would do with a teen-ager than a grown adult?.
I think that is a set-up for you to be policing/parenting her and I can't see that ending in anything other than mutual anger and ressentment.
Have the two of you talked and do you know what/how she foresees her stay with you and what she will contribute?