I have a 3D printer, small bed unfortunately. The filament cost will break you (who am I kidding, I'm talking to gun guys here!), and it has a tendency to tangle, thus ruining your print. Any humidity and it doesn't work either. At least you can put the filament spool into your oven (very low temps) and dry it out. It also takes hours or days to print anything of size.
There is a site called Thingiverse.com where people leave all sorts of neat projects, probably including powder funnels already mapped out and ready to download and run.
In short, it is NOT a turnkey effort, you do have to learn all sorts of new stuff, like slicing, bed levelling, software package to take designs and convert them to g-code, etc. It takes time, patience, and lots of doing things over until everything is set up just so. And then it can still go wrong. Kinda like reloading . . .
That said, when your first successful print is done, you feel like nothing can stand in your way.