Unfortunately divorce and arguing the custody will be cost a lots of money if you and your husband can not reach any agreement. However, every case is different, my advice is that you should consult a solicitor. You may make appointment to meet one, explain your situation and ask what option do you have before have decision to go ahead of proceeding. Divorce is painful not only losing money but emotional as well for you and your kid(s). You may reconsider before you really make up your mind.
I am sorry to hear that you have suffered such bad marriage. All you should do now is stop listening and thinking what he said. Of course he will continue insulting you, bullying you. Just remember all he said is not true and you need to believe in yourself. You need professional advice and fight for what is the best for you and your children.
Don't worry about what he say, as I have told many mums here, I don't believe the court will grand the 'care and control' to your husband unless you have 1) Mental problem 2) your are violent 3) you have drugs problems. The judge may ask both of you to "Join custody" which I have, and you may be the parent have the "Care and control" especially your children are so young. Don't worry if you earn less than him or even full time mum. It doesn't matter as long as you are a responsible mother.
Be strong and look after yourself mentally and physically!
Don't worry too much! It's irrelevant! The Judge only look at the FACT. HK is still followed the British Family Law which it's normally favour to the mum, just look at my case, my ex is a Barrister whose expertise on Family Law, but so what? He couldn't take my kids away from me!
So just believe in yourself, be positive to look after yourself and your kids. PM me if you want to talk to me.