The idea of shipping canvas in tubes has me less enthused. Most people can't stretch canvas over a frame on their own, so they have to get somebody to do it for them. That person probably isn't very cheap in their locale. This step is potentially done better at the factory.
Next the stretched canvas needs to be framed. Once I have my 12" by 12" canvas stretched and then framed, I wouldn't be surprised that it cost me some multiple of the $53 price. Besides a costing a bundle more than quoted, I had to do some legwork in meatspace to get it wall ready.
The quality of the work has to be good too, otherwise the prestige of a painting will be overshadowed by its gaudiness. Might as well hang the original photograph then.
Overall, not an easy business to get right, but monetization is built in. I hope you succeed.