i use wood.
pvc didn't work for me , that's because in my country pvc pipes have different specifications (thinner walls) ...
what i hate about bows is that they need arrows and for accuracy they need
identical arrows.
i've made arrows with tape fletchings , wooden dowels for shafts , and simple target metal tips
they cost 1,5euros each + work .
don't forget you need to spine the arrow shafts so they are almost identical when flexing.(with a spine tester)
i suggest you try it to get a taste.
but in the future i would prefer to buy good arrows, pay double and skip the work