Very big panoramic portrait print, probably canvas. Suppliers

[gad-westy]

Have an idea for a bit of dead space in our house. Print would be an odd shape in that it would be something like 800mm wide by 2000mm high. Though I could scale down from that and keep the proportions the same.

I'm really looking for some suggested suppliers. My assumption is that the only cost effective way to do this is a canvas print but I'm open to other ideas.

Any recommendations?

Any comment on a minimum DPI for canvas? Viewing distance of min 0.5m