I read an article a few years ago in Fine Homebuilding of a home built pre-cast stone masonry walls. Here's a link to the article and pictures Stone Home. Although, I wouldn't build my home like this, I thought it may be a great way to build nice looking retaining walls. The walls could be poured when work was slow and stored until needed. Any hardware to lift or anchor the walls could be precast. A cap rock could then be applied with motar after install. Walls could be made in a standard size (either 4' H x 10' W or 3' H x 10' W) and moved with a loader or forklift. I think this could greatly reduce labor cost, yet still end up with a great looking end product. Does this sound feasible?