Unlike child support, spousal support is often very difficult (if not impossible) to modify after the divorce is final, so getting it right the first time is a must!
Why aren't you filing for a fault divorce now and asking for immediate relief as to the disposition of the marital home ? A court can order the property sold . One of the fault grounds in PA is :
The court may grant a divorce to the innocent and injured spouse whenever it is judged that the other spouse has: Offered such indignities to the innocent and injured spouse as to render that spouse's condition intolerable and life burdensome.
With the income difference it's likely SS may be ordered but it could be less than what you are already paying .
-------------------- Never let your sense of morals get in the way of doing what's right. Isaac Asimov