CT, I was shocked that you would just throw out there that “the investment in a son in-law learning in kollel is thrown away money after the divorce”.
Support of a young man learning Torah has inestimable value and has nothing to do with an end result. But even if your support is only for the tangible benefit, the effect on children of a home where the father dedicates substantial time to learning is enormous and will have a lifelong impact regardless of whether the marriage ended in divorce. I sincerely hope you reconsider your position.