...Hi Liam - given this really visual quality of this house, it could also be an option to aim less for a perfect rendering result (which, as we all know, often becomes an endless task) but more for a much more graphic solution? A rendering probably won't be that much better just because you invest time and sweat in superfluous banalities like a sofa, a ceiling lamp and a dog in the garden?
In my view, the quality worth emphasising here lies in the wonderful geometry, the successful combination of volumes, lines and proportions.
So how about an approach consisting of a fairly simple not too photorealistic render image, combined with SkUp graphic output, maybe any clay render + hiddenline, perhaps even sketchy with overdrawn lines + a striking graphic background etc.?
just thoughts - a beautiful work in any case
(I know - even with such an graphic approach one can burn too much time and sweat but it's much more fun than waiting to see if any renderer calculates a shadow a nuance lighter or darker here or there)