I’ve never been around one of these magic printers. How does the printing material come? How many material types are there? How expensive is it to print these objects?
Printer filament comes in spools, usually 1kg (2.2lbs) and usually are around $20, Cura (slicing software) if you put in cost of the spool will tell you the cost to print something (looks like 335m per spool and cost of $0.06 per meter, at the speed I print at figure less than 10 cents per hour.
Material types vary, Most of what I print is in PLA, but I've also printed TPU PETG, ABS You need to look at your printer and see what it will do for temperature, also if you get into some of the exotics fumes may be a concern.