That's a lot of work and time investment!
At the moment I have 5307 wallpapers, mostly 1080 and 1200p. I started collecting when I only had a 1080p monitor. And most of my wallpapers were 1080p, so there was no problem. But with my new graphic card I could connect my old 1280x1024 monitor, so I have a resolution of 3200x1080 right now.
I save every wp I like. I work on the smaller ones, to get them to 1080p. And most times I'd attached two wallpapers to my screen resolution, but since I have MultiWall installed, I won't bother to with not fitting wallpapers, because the programm adjusts them itself. I only change the really horrible ones. And edititng and collecting aren't my only hobbies, so I don't invest to much time to it. So everytime someone did a job I could/should have done myself for my own purpose, I'm grateful, that I didn't have to do it. Especially when their work is as great as yours is.