[AFMUG] Small Portable trencher

[Steve Jones]

For these residential deals, we occasionally lose out on new customers
because they dont want to trench cable themselves.
For this purpose it really only need 4 to 8 inches, just to stay under the
sod.
Is there a device that attaches to a drill or sawzall? Maybe a chainsaw
modified bar or a bucksaw trenching blade?
Not looking to get into a whole trencher, just something that ideally would
fit in the truck on a shelf