He may transfer some money from his account to others (like China or his friends). you can ask for receipts through your attorney.
At first, you don't agree on divorce. Then, you two need to see consultant. If it doesn't work, you two will see the mediator to see if you can make a agreement on divorce. If it doesn't work, you two will go to the trial. It will take more than one year. (My case is one and half year till the decree is finalized). Hope it will give your time to get Green card.