Carlos,
Thanks so much for the advice. It is frustrating that there isn't more out there for the Americas.
At this stage I think I will try the paper church first since it's free, then try a complete scratch build if it looks really out of place. Unfortunately the tower is stone, so as you said, a bit too fancy for a small town. Perhaps there can be a holy shrine there or a wealthy patron who sponsored the tower. At least the majority of the building is stucco.
Stay tuned!
Chris