i have a student that do 3D printing services.

yes, u give the 3D file, then he will print it for u according to the scale u prefer. sometimes, to make it more efficient, some editing will be done to maximise the outcome.

he charges based on plastic weight (in grams). any editing on his part will incurr extra cost as well.

he bought the machine himself (just like anyone would by a normal inkjet printer) and keeps it in his room .

rapidprototyping machine? that one costs RM100k++. sure cant afford.

3D printers nowadays are just RM4.5k aje. if students can drive impreza to class, sure he can afford one.