Several things here. As has been mentioned she can major in anything and as long as she completes and does well in the pre PT prerequisites she can apply to DPT programs. PT is a professional doctorate so budget for that as well. Instate publics tend to be the most cost affective but can be the most difficult to get into because of that. She will also need a number of shadowing hours. It may be different from when my D was applying due to Covid restrictions but in her experience most of those have been lifted. Direct entry programs can be a plus, however, they are often more expensive as they tend to be private schools and typically the graduate portion of the program is not part of any scholarships. Attending an instate public will often be considerably cheaper.
My D attended Ohio University for both her undergrad (Dance major and ended up with a Biology minor) and her DPT program. For her 3 years in the DPT program the cost for tuition and fees were around $54000 (instate) plus room and board. There will also be clinicals so you may have a couple of times where you will be paying for two residences. Be aware starting salaries for PTs are in the $60 - $70k range. and max wages range in the 80s to low 100s depending on where you practice. There are people who make more in certain settings or by owning their own business. Ohio University is a mid sized public university with a good athletic training program. Their DPT program is top notch as well. They have a direct entry program from various majors that you apply to after your first year I believe (It’s been a few years). I would recommend she check into it.
My D is in her final clinical and will take her NPTE (National Physical Therapy Examination) late this month. She is winding down the process and moves on to applications and interviewing. She is hoping to get into performing arts PT. Her current clinical is working with a company that provides PT services to a dance company in Chicago. Good luck to your D.