DIY 4mm/00 people

I get great pleasure from photographing my model railway by staging a scene in a photograph of the prototype. The next one I have in mind is of a train waiting in the platform with a few passengers on the platform, some seeing off their friends or relations. I have scoured the web for commercially available little people and found a couple that could do for some of them. But, there are others for which commercial models do not fit well either because of fashion/period or their stance. So, I need to consider creating my own little people. There seems to be three methods open to me. 1) 3D printing is a very exiting technology. Our little people have to be built in 3D design software and the resulting print file loaded into the 3D printer. The actual model is made in open air on an XYZ platform using plastic that is melted and ejected from a nozel. 2) Moulding requires making a model in clay or something mailable and creating a mould from it which is then used to produce robust replicas in resin or whitemetal. This is ok if we want to create duplicates to sell, for example. 3) Modelling is about making the little people individually from a clay material like FIMO. This approach is very low cost, a few pence per person. The tricky bit it seems to me is creating the head with facial features. I have an idea how to achieve that. I'm going to attempt 3). To Part 2