This is not something he just thought up, I saw him say the same thing in an interview when he hadn’t been campaigning more than about a month or so. Either Bill O’Reilly or Hannity, I can’t remember which.
He also was asked if moving into the White House wouldn’t be a step down from his current digs at Trump Tower, he said something like ...yeah but it’s a special place...
I’m sure it’s been around, but it doesn’t hurt to remind folks.