For printing out stuff, you could go the easy route and just save it to disc etc, take it down to your local copy shop and have 'em print it out at the size you want. They'll probably laminate it too. If you live in the US, Kinko's/FedEx does a good job for a reasonable price. Also, there's our member Gamerprinter, who does it for a living. You might PM him and see what he'll charge ya.

As for getting discouraged... well, I look at those 3D models you've done and want to weep, because I know I could never accomplish anything that cool. So there.