I’m still recovering from a broke ankle. I can operate my backhoe but the man behind the jackhammer won’t be me. One of my buddies has a jackhammer. I might try to get him to try it before renting a mini excavator.
I forgot you was the one with broken angle, sounds to me if you know someone with jack-hammer, I'm sure he wouldn't mine giving that a whirl, would be nice though if you did have one to hook up on your excavator. And yes you are to close to a foundation for explosives.