how to split proceeds of house that had separate property commingled into it.

If you have been in a marriage of that length and you have the various property issues, including potential commingling of property, your attorney, if he or she is a divorce attorney, should be able to assemble all of the documents and evidence to provide definitive ideas and methods of dividing the property, including the house. It is a detailed fact issue. If you don't have an attorney, you had best hire an experienced family law attorney now and get moving to assemble all of the documentation and evidence required to properly assess the values, and make plans for the division of the property, particularly in light of child support, and spousal support, as you say that you are a stay-at-home mom. It all combines in a potentially very large and complex interactive picture, particularly concerning whether you and the child, or children, stay in the house. To truly provide full information and options hire an experienced family law attorney. Should you wish, I may be able to assist you. David R. Hartwig 801-486-1715