i wish 240V was more common. i can't charge my EV at a reasonable rate and it would cost me $15k+ to install a 240V in my detached garage (requires trenching).
I don't know where you are, but in the US a walk-behind trencher rents for under $500 per day [1] [2] [3] [4].
[1] https://www.sunbeltrentals.com/equipment-rental/earth-moving...
[2] https://www.compactpowerrents.com/rental-equipment/trencher/...
[3] https://www.compactpowerrents.com/rental-equipment/trencher/...
[4] https://www.compactpowerrents.com/rental-equipment/trencher/...
More common where? Your main service panel is 240V. Do you only have a single 120V circuit feeding your garage?