dwg files and revit import into unreal engine as soon as possible

When would this be possible and if it is can anyone help me?

Not yet but they are working on it. Right now the best way is Revit export to 3dsmax to Datasmith into Engine. They are saying that 4.21 might have the plug in for Revit.

We will support DWG and provide a Revit plug-in for 4.21 - which is in a couple months.