Hanging clothing uses 2 feet. If you have the rod as far back as possible, that only leaves 2 feet. I wouldn’t call that a walk-in.

Or are you suggesting one access door clear at one end and walking along a 2-foot-wide alleyway for the entire length of 10’? I don’t want to assume how wide you are, but I think my body is approaching 2’ wide. That wouldn’t work well for me.