it honestly depends. if I'm expecting someone and it's not a dreamie it'll take me about 10 minutes, maybe 5x as long as they aren't in a path and didn't ruin any perfect fruit trees. however if it's a dreamie, which I haven't had the privilege of having one yet, I want them to be in a specific spot in my town so I think it'll take a while
I've heard of people spending all day! after the 3rd try I'm sick of it lol
I spent two days with plot resetting a villager I invited from the campsite. I wanted her in the area on the bottom left side of my town, so that her house doesn?t destroy trees, flowers, and paths.