Pastors of some larger Protestant churches may be able to do it, because there are so many involved in the administration of the church. Parish priests don't have that kind of support staff, because parishes simply can't afford it. They would never have the mental or physical stamina to care for a large parish family in addition to one of their own.
What I wrote was comments from the wives of vicars and ministers, Protestants. It was a general comment from them.
Parish priests from Catholic parishes ALSO have help, support staff and such. Many are volunteers but there is always a staff for the priests.
No one man has the "stamina" and parish priests aren't alone. How much help he or they get depends, of course, on how many Catholics are in his/their parish, doesn't it?
I volunteer at my own parish. There seems to always be a "staff of middle aged ladies" who help in parishes. Well, in the ones I've seen, at least.
Also, parishes connected with schools always have "mother" help. That is on-going and it is expected of the parents of those children.