Here's an answer from left field. I've been a physical therapist assistant for almost 10 years and just graduated with my MS-SLP and I am currently a CF-SLP. I can tell you right now that PT is way more appealing to me and will always be my primary passion. I chose to add SLP/go the SLP route because my body couldn't handle PT stuff full time anymore. But if my body were capable, I would definitely rather have been a PT or continued being a PTA for forever. That being said, DPT degrees are expensive and the pay is much worse for a PT than an SLP where I live. Just do your research. Even OT might be an option. There's pros and cons to all of them. As a PTA, I had minimal student loan debt and my pay was pretty good. but I admit I was craving more autonomy. Anyway, just do your research.