I make everything for 3ds Max rendering now-a-days...
I use Wings3d and Max for modelling.
Not clear on exactly what Poser needs for models (I only have Poser 5, no later versions).
About everything I have made modelwise is either a lot older (Fantasy and/or Grecko-Roman antiquity) or alot newer (sci-fi) than Victorian era. I have many contemporary models too, but that doesn't help either. Mostly all architectural.

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Maybe find a picture of some tourist trap reproduction village to use as a ref. A Rennaisance Fair or something.

Doesn't need to be blueprints or anything like that, just some kind of ground plan; and some specific style(s) to aim for. To tie everything together with some coherency.

Friends don't let friends use booleans.