Earthworks / Site Grading

Can anyone suggest a good workflow or plugin for working out site grading for residential construction. Typically we have a contour plan, and want to illustrate and model the required earthworks to get a balanced cut to fill on lots of land around 1000sqm in size.
We also need to incorporate retaining walls and batters.

For your interest…

Terrain Reshaper by Didier Bur

TopoShaper by Fredo6

CutNfill by TIG