Most PA schools I have heard of require 100 or more hours of clinical time to even apply. I am not sure why. If you plan to actually get an education to operate in a clinical capacity in all but the most basic (like EMT) levels it will take you at least a year if not 2. At which point, if your route was ADN you are much better off continuing to BSN, MSN, NP, and CRNA. (the last of which I have the most respect for based on their curriculum)
PA school wasn't created for people who are considering getting into a healthcare field. It was designed for people who had already gotten medical training as a nurse or paramedic (or originally a military medic) as a way to expand their knowledge/scope of practice. When it was originally created, the only way to advance would have been to go to college, get all of the pre-reqs for medical school and go through medical school and residency, and someone who was 40-year-old wouldn't want to go through 10 years of training, especially when they didn't actually want to be a doctor.