A friend bought a large format printer on a whim. Something like 4' or 5' wide and as long as you want. I never printed anything on it as cost of supplies to feed it exceeded my ability to pay. Unless you are selling work at commercial rates, the economics were awful.It’s actually cheaper to take your files to WalMart and have them printed there as opposed to supplying your own high end paper and inks.
I worked in the printing industry for 28 years… I have experience with this stuff.