Haha. Yeah I did in fact modify my driving method. After much debate, I ended up putting on my mechanic's hat (I'm not actually a mechanic of any sort) and repairing my dad's long reach excavator. After I set the posts by hand, using a sledgehammer while standing on a ladder, I just had him hammer them down with the excavator bucket.

Had I not been able to repair the excavator, my backup-backup method was to borrow an electric jackhammer then, somehow, wrangle it up a ladder and jackhammer them down. Also in consideration was using my trash pump to water jet them down.

The black ABS tubing is just a conduit in case we add electrical in the future