Just wondering how expensive they can get... i wanna make sure i have enough sp to follow through with the quest so i don't lose my instructions.

the most expensive thing normally is the kit you need to make them. You can see what kind you will need by searching the instructions on SubetaLodge

beware of vania... he may ask for another instructions to complete the quest, and some of them are very expensive

oooh. thanks for the tip! i'd better hold off until i save more sp.