Hi,
My opinion on using still photography lenses
Advantages:
a) you can buy them or rent them quite cheap.
b Quality is extremely high with high end Full frame Zeiss, Nikon and Canon lenses. always get fast high end lenses.
c) No modifications required.
Issues
a) Not made for film style shooting: Zoom and Focus not ergonomic in a film way of shooting.
b Still Photography zoom ranges are not optimal for film shooting.
My opinion on using PL lenses
advantages
a) choice of lenses rental: no limits
b High ergonomic factor: you shoot faster, you can employ film crews.
Issues
a) high rental price tag for high end lenses. If you rent cheap PL lenses you're better of with still photography lenses.
b not owning the lenses mean you can not experiment at home.
I personally opted for high end still photography lenses and am quite happy. You need to invest in a Follow focus and a matte box exactly like you would for PL lenses.
You can totally work in a professional film style with these lenses.