I enjoyed reading these, my only disappointment is it took you so long to share them. After reading through them and taking a bit of time to reflect, my opinion has shifted a bit.
I believe third party reproduction (related to the OP topic) should be a legal option for people. This allows individuals and couples the ability to pursue the idea of raising a child starting from a very young age. With that said, however, it needs to be heavily regulated. The process needs to be long and complicated, because this is not a simple decision or process. There are a lot of factors to consider when going through with something like this.
If a woman wishes to volunteer her body as a surrogate, I believe she should have the ability to do so. But, as I said, it needs to be a long process. There needs to be a sound understanding of the health risks involved, there are legal proceedings that need to be taken care of, finances need to be calculated, physicians need to be arranged, etc.