Switching a whole office on a "huge+" project might be a big step. The whole workflow has to adapt.
If you go into a mixed environment, with partly ArchiCAD modeling and partly AutoCAD 2D drafting, it will be a pain.
It depends on the office, though. Some offices evolve from AutoCAD 2D to Architectural Desktop (ADT), realise it's complex and downgrade to plain AutoCAD again.
Others rethink their workflow, evolve to advanced programs such as Revit, ArchiCAD (and yes, even ADT) and never look back.
You can be productive using ArchiCAD alone, but I suggest proper training and internal consultancy to set up a performant office template, to get to the promised productivity level. This upfront costs are well worth it, once you start getting productive.
Maybe contact other ArchiCAD offices in your area and try to have some reference work shown.
--- stefan boeykens --- bim-expert-architect-engineer-musician ---
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