Architectural Elevations - Large File Size Issues

Writing your own special brick hatch pattern is not such a difficult thing. As @jbmanning5 suggests start-stop points are going to be an issue as Cad hatch patterns are straight lines only, but if you are willing to do the work at it Inkscape would allow you to do the entire hatch pattern with very few start-stop points, I laid out the basics here but talking about puzzle pieces instead of bricks
It was my thinking that a low LPI would give you a lot of horizontal lines that would imply the brick pattern without making every brick.