I also read that you employ staff. Can you ensure that you have enough hands-on others to deal with the nine and you can be an extra, not having to work 7:30-18:00. For example, if only two minded kids are there from 7:30-8:30, you could cover that time with your DD there (having breakfast, getting dressed, etc.) and others could do the more full-on times. What have you done in all the time she has been off school sick?
Does your DD like being around the minded kids (I saw you had a thread in 2008 about a GCSE in childcare)? If so, she can help and therefore you will be working together.
You do not need to worry about academic work for her. She needs time to settle and to recover from what has been giving her problems. I'd de-register her tomorrow and concentrate on de-schooling, as described by NAB. Allow a month for at least every year she has had problems and probably for each year she has been at school - i.e., I would not expect her to be ready to do formal learning until next April. In that time, you do things that she is interested in (such as music, TV and reading) but without tryng to make it "fit" a school mould.
If she wants and needs qualifications for what she wants to do, she could do GCSEs at home, perhaps from 14-15; go to college at 16 and do 5 GCSEs in a year to get onto A-level courses; or enrol on Open University courses.
My DD has never been to school and is about to go off to university at 18 to study law. She has done five OU courses over the last 3.5 years - no GCSEs, no A-levels. Not covering the KS3 syllabus is not a disaster!
If you would like to talk about home ed on the phone, I'd be happy to discuss it with you. Email me at [email protected] and I'll send you a phone number.