Before I attempt to venture into your marriage issue, it is important to highlight the money issue. Your partner is busy playing Mr Businessman safe in the knowledge that succeed or fail, he will be fine as you will take care of him financially; I'd most certainly be putting a stop to that! It's a monstrous recession and only extraordinary businesses will survive, I urge you to discuss this with him at a neutral time.
I know nothing about you or your relationship apart from the fact that you love your partner, the question however is does he truly love you? Does he love you so much the thoughts of your not being there would cause him grief and unexplainable pain?
The fact is, you have both been married and seen how it can go wrong. Adding children to this equation simply makes things worse for all concerned and the pain of separation even deeper.
Therefore, there are really only two reasons for him not to wish to remarry; either (1) his first marriage did irreperable damage to his faith in the union (which can be fixed through counselling etc.) or (2) he doesn't love you enough.
Hope it all works out all the same,