On the canvas wrap, my printer is a 17" 3880 and I run cut 26" rolled canvas through it (Rear door, although somewhat stubborn to get it aligned perpendicular to the print head's rail without it tossing up a "Loading error" message.). If I'm lucky on the alignment and feed, I might end up with a even 1/4" white border. I shoot them with Premier Art Lacquer ("Print Shield" in one quart bottle and it looks like water?) out of a Sata MiniJet gun, fwiw. Never had much luck with the roller stuff.
My framer doesn't need to do a canvas wrap on my 17x25.5 inch canvas, but somehow bonds it in a press for 30 seconds onto some substrate. Then uses a faux-suede 3" wooden liner around it, and puts it into a 28x38 inch Arquati frame. So far so good, but not cheap ($450 frame, with another $60 with daylight-balanced blue bulbs for the light fixture mounted to the top.).
I've rolled long canvas panoramas onto laminated core boards in the past without issue, just you might need an additional fabric glued to the opposite side to prevent bowing due to humidity.
