cultivation wheel hoe tool weeding bcs path

self propelled wheel hoe?

Has anyone considered or seen a self-propelled wheel hoe or potential bcs attachment that could undercut weeds in pathways? We use the tiller attachment for all of our path cultivation but it is slow and mean. Pushing a wheel hoe over 20 acres of bed paths sounds pretty brutal but a BCS attachment could be pretty nifty. Any thoughts or experience with self propelled wheel hoes out there?