To fit the theme, I decided to make the houses seperate BSP brushed and tweak the edges to create off-angled geometry. Doing this, I ran into both the hall-of-mirrors effect and low framerates.

To fix this problem, I discovered that I could make slanted BSP geometry by moving only one edge on each fact of the houses, followed by slightly rotating the whole structure when too many parallel lines were apparent.  I created all the static meshes with odd-angles in mind to break up the geometry of larger buildings.