husband threat of refusing to pay school fees

[conway]

I have posted many times about wanting to leave my husband. After another year and couple counselling I feel I am Ready.
I have booked to see a solicitor tomorrow.When I told my husband he told me that I would ruin the children's lives as they wouldn't be able to stay in their private schools.
We have seperate bank accounts so I don't know how much money he has stashed away. He earns 5x my salary and our mortgage is paid off, so I don't think he is that badly off.
Do you think he can and will do this?
Is there anyone out that you thinks it is okto do this?
This is precisley why it has taken me so long to get to this point as I am so concerned about my boy's welfare, Age 13 and 8.
I actually thing that their welfare is more important than mine.
The reason that I want to leave is his possible cheating( no proof), his drinking, no love on either side and his controlling and bullying behaviour.

Thanks for all help. Will make another apointment to see the solicitor and a diary is a good idea. My mum and dad do know the situation and are supportive but worry about the boy's. A few friends know but I think they are fed up with me now as still haven't done anything. Been married for 18 years so I guess that it is a bad habit to break.
MY mother in law over tomorrow night so another night of playing happy families, but have been doing that for so long now am getting very good at it.