I do almost everything my self but one exception is an entrance service. I have an electrician do it start to finish. In NY to avoid being without power it requires a permit and then coordinating with the inspector and power company. My son’s electrician knows them and makes a few calls for a seamless process. If I did it I would be without power while I made 3 trips for parts, then the inspector would be too busy and he would show up late, then it would be after hours for the utility and my wife would be pissed off from living in the dark.