I spent about 2.5 hours on this one. I blocked in the shapes and then started getting more specific with it, eventually zooming in pretty tight to get some areas to read a bit more. Looks amateur as hell, but I'm definitely out of my comfort zone with this sort of thing.
The thing I've been looking at with other artists is how to convey the "idea" of bricks and structures without adding every single shape and block. In this case the strokes looked pretty plain and flat and my attempt at suggestion didn't really work out.
Finally, the perspective is wonkier than I thought while I was working on it. I don't think my underlying perspective grid was what I needed, but ultimately it was just an oversight on my part to keep track of the perspective. The poor thing looks like it's about to collapse in on itself.