Also check out BlenderBIM (I work on the umbrella organization it is part of) it has really comprehensive covering of IFC (using what they call native IFC autho

Also check out BlenderBIM (I work on the umbrella organization it is part of) it has really comprehensive covering of IFC (using what they call native IFC authoring) including things as FM, hvac systems and 4D. It's fairly new so probably rough around the edges. Regardless, invest a good deal of effort in open standards such as IFC. The proprietary tools really leave you in the dark about long term maintenance and data ownership.