If you haven't already, check on Strohecker's Pharmacy. They sell testosterone (with a prescription) for $52+$6 for shipping. That includes a 10ml vial, needles and syringes, and alcohol wipes. My vial lasted me 5 months. So that's roughly 11 dollars a month.
You'd have to call a local pharmacy to see what their individual price is and everyone is a little different.
And, yes, from what I understand, informed consent means you don't have to have any type of documentation. Just sign that you understand what T can do to your body, that you want the treatment, and that you aren't going to hold them responsible for any unwanted side effects.