Without reading the scriptures you noted, smalls85s, I will say that anyone can preach. There is no law against it. If a person feels that he has been called to preach, he can do so. He can construct a church if he desires and preach or he can be a street preacher. However, if that person wants to work within the framework of an organized church he must meet the requirements of that church. If there are legal ramifications relative to the State, he must meet them to be in sync with areas that the state is by necessity involved with. You can't get a divorce, alimony, handle property divisions, child custody, social security matters, etc. in church. You need a marriage license and a legal official to marry. If you don't have that, it could be a problem. Render unto Caesar.
I can see the necessity of an organized church. Because I wonder whether all who say that they are called of God to go preach really are. God recognizes those whom He has called to preach. But do we? Thus the organization, license and ordination. We hope the ones who are called will be among those who will meet the requirements and stay the course, or at least that those who are not will be deterred by the requirements.
God directs on our Christian journey, and we adhere to His will. If God calls a person to go preach, then that is what he must do. If God called him/her, He will make a way. I will read the scriptures, though at a later time. I am sure that I have read them before, but it is hard to read the Bible too much.