TFA mentions difficulty trenching in rocky soil as an obstacle for running power to the shed. I'd like to point out that running power overhead is also an option.
It is, but that comes with other problems that not having overhead stuff simplifies, like not being able to run the tractor around, and having the office then officially grid tied, which means I need inspections and permits and such.
It's totally fine off grid, and I like it that way, plus it offers me a rather robust backup power system.