There are plenty of psychological drawbacks as well. Consider for example that the fence between your house and your neighbor has become dilapidated. But your neighbor thinks it is fine and will not pay for a replacement. What do you do? Replace the fence without cost sharing? Argue with your neighbor on the condition of the fence? Or even after your neighbor has agreed, the act of selecting a mutually acceptable contractor to carry out the work? A lot of this feels like being a project manager, and if your day job is a project manager or even a senior engineer who sometimes wears the hat of a project manager, this could feel like a second part-time job.