/diy/ - Do It Yourself

Is there a smarter way to solve this problem: There is a tripped circuit that is cutting power to a bunch of outlets in my house. Years ago a landscape contractor extended this circuit into the backyard and didn't leave any as-builts so I have no idea where the wiring is except for a couple of GFCI boxes in raised planters. I disconnected this outdoor part of the circuit and now the circuit breaker stays on so the short is outside somewhere. I've been slowly digging through the garden following the conduit from the base of a GFCI, painfully avoiding tree roots and dripline, looking for a break in the conduit. My question: I'm a retard who knows jack squat about this stuff, is there a better strategy to solve this issue?
Inb4 call an electrician, I know, but my family refuses to pay professionals for this kind of thing so I'm stuck doing it myself.