Go back to the same day you requested him to move in, and put up the PWP gyroid.
Then go back to 6am next day to plot reset.
Make sure you go back to a time in the day LATER than when you last saved, or else it counts as a TT backward, which the game will interpret as a +1 day forward in time and set up his plot. (hopefully you get what I mean)
If you are unsure how late you played last, just go to 5AM to be safe, and set up the PWP then.
Oh.
Um, not sure theres anything you can do then.
Just set aside a day to plot reset, and you should hopefully get him to land where you want eventually.
You told him to come, so he'll be there tomorrow. No stoppin it.
Sorry man