My Lawyer wife makes as much as I, is getting fully paid off house, do I still pay Texas calculator based child support?

Because your wife is an attorney, it is strongly recommended that you hire an attorney to protect your financial interests and access to your children. It sounds as though you two are still in negotiations about your divorce settlement, but it is unclear if you two have gone to mediation on these issues. Mediation is a metting where husbands and wives discuss their concerns and privately decide what assets they intend to divide and what arrangements they want to make for child support and visitation in a divorce. If you are unrepresented, you are at a grave disadvantage because your lawyer wife likely has an attorney and her own legal knowledge to tip the scales of fairness against you.  If you'd like to share custody of your children in lieu of child support, that is an option to discuss with your wife and her attorney, but I do not know if this is appropriate. That decisions depends on the age of your children and the distance the two of you live from one another.