Sue, maybe I'm being daft, but I'm not sure why you keep posting new threads on the same topic? Why not just add new information to previous threads regarding this situation, that way the responders would have more background without you having to rehash it all every time...
There are at least three previous threads posted by yourself, with the same complaints and issues... and the same advice comes up every time. You either ignore it, give reasons why it won't work, or respond with 'that's your experience, not mine'... I'm unclear as to why you keep posting asking for advice when you don't seem to believe that other's experiences can have any bearing, or take the advice that is offered?
When you are asked questions that may help to give a clearer picture of your situation, you ignore these as well.
It's quite frustrating for those trying to help you.
Maybe if you put some info in your signature, like your children's ages, and the specific medical/support issues that each child has, just so we can keep better track and hopefully give more relevant responses