I've never spent more than 30 seconds, regardless of dirt, soil, frost, rocks, water pipes, etc.
Hilti TE905AVR.
these two are what's in my toolbox. i never got the spiffy doodle
lever operated ground rod grippie thingie.
however, i do have a number of fun toys for it... clay spade, concrete
bushing hammer, 6x6 soil tamper, and a number of chisels.
they make a spring steel scraper for taking up vinyl flooring i wished i had
today... but i promised myself never to do anything like this again, so
i'll never need it....
i got mine used off of ebay for $380, and it's got some miles, but quite
serviceable..... altho not as shiny and purty as yours is....
a word of warning to prospective purchasers... this tool takes only hilti
tools, and hilti, judging by the pricing, makes them out of pure
unobtanium or something. a clay spade for any generic jackhammer, $75.
for this fine example of german pricing, $275.
you have been warned. even at that, it's an excellent tool. it'll drive a
8' ground rod in 30 seconds or so, just like the man says.... if you need
to drive it thru a 12" concrete fire main, allow another 15 seconds.