Your questions are, unfortunately, too complex to address in-depth in this forum, but I can provide some quick basics and you can follow up with an experienced family law attorney. As to your Separation Agreement, it may have provisions in it regarding enforcement, so you should start with the document itself. Additionally, you can seek enforcement through the courts by way of a contempt action against your ex. Contempt can also be used to enforce child support orders. Furthermore, your child support order may include an income assignment that you can register with your ex's employer. In Colorado a child support order becomes a judgment when it is due. You may be able to file a Verified Entry of Judgment and put a lien on your ex's real estate. In short, there are several avenues to enforce both orders, and an experienced family law attorney can help you decide which course of action will be most advantageous to your specific situation.