Hello! I am currently having the same issue too! If the denomination of church does not matter we discovered a church right off of Baylor Campus called Seventh and James Baptist Church that does allow non members to get married there. There is quite a fee though which is a little under 2k I believe. If you find any other churches that do not need membership to get married we would love to know which ones!
Try Trinity Lutheran At Badger Ranch. Also, there's a small church called something like Universal Unitarian that rents a small sanctuary. Good luck!
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