Another perspective study from hell. Where do you put the vanishing point on paper where the horizon doesn’t provide one!?!
I used 2 point perspective here for the most part. To figure this out, I drew the basic sketch onto a piece of paper that was larger than the final sketch. I decided my horizon line. Then I drew the building, uprights and then angles for the roof line and base of the building, both on the left and the right. For the wall, I did the same thing, aiming it at the horizon line and trying to get the top and bottom to line up.
Ummm. Not sure. It looks okay in a lot of ways except for the wall – too wide nearer the building perhaps than it should be in the lower left foreground.
And getting into perspective. I don’t have depth perception – eye docs confirm this. But I do get distance – I can guestimate a distance and when it is measured, I am pretty accurate. This makes me think that a sense of distance and depth perception are two different things entirely.
Ink, Yarn & Beer 
I think you’ve done a good job on everything else but yes the wall is too wide at the far end, should have been decreasing exponentially.
Thanks for the feedback, Fraggy! What I expect is that I may have missed my “dot” on the horizon for the vanishing point, or visualizing it with a wide-angled lens – say 16mm!!