I don't mind at all, and to be honest I totally miscalculated this project. I worked on it for 3 months now (not all the time, but most of it). Especially making the houses took a tremendous time, as I am fairly new to modeling, and encountered several problems texturing at first. And there were complicated buildings I didn't know of when calculating my price. The terrain itself was a 'piece of cake', but placing the houses and rewiring their dependencies (they all link to a bunch of communal, internal shaders) took a lot of time as well; 240 houses of 35 types or so. Boring job.
I was also afraid they would find a guy who just painted something cheap and fast, and I was quite keen to do this. But despite the low earnings, it gives me a great sense of reward, having pulled this out of my hat.
I'm not a member of any organization such as you mention, so I have to think ahead and try to imagine the time I will spend. Hard, but a lesson for next time

Soft shadows improves the image a lot, as does elimination of my fill light. Martin's recommendations followed, but I made the soft shadow 1 and samples 5, jitter 1. Still takes almost 3 hours for this part, which is about 1/8 of the total. Added a wagon I made yesterday (not the horses). Another crop is now rendering with jitter 0, see what happens. I also lowered the wave size for the next crop.
No post work, by the way.