As
@MattZilla said - learn that machine inside and out, then use it and your new, valuable skills to earn extra money doing what 3d printers do well. You could easily have a
career that will allow you to buy the stuff you want.
At this stage of technology, 3d printers aren't really the best tool for building complete guitars. However, the skills involved in 3d printing would certainly carry over to CNC routing/machining. CNC is a very, very good tool for making guitars, so if 3d printing is something that interests you, something you have a talent for, get into it, make some money doing 3d printing, then expand into CNC.