I’m up to 42,000,000 vertices now. Texture size isn’t much. I’ve been able to use the same wood texture for all the wood. I created a Node Group for the basic image texture information (it contains some randomization of color for each object) and then I created several shaders based on the node group that adjust the lightness & tone of the wood. All of the wood texturing is done with just 3 seamless wood files.
Below is an example of one of the shader variations of wood. The RGB curve & HSL nodes are what I use to make variations of the base color.
A few updates on the carvings:
I was fortunate to find a nice set of small ornamental pieces on blend swap that let me fill in smaller areas.