(3)  Things Will Go According to Plan.  “Bad news” happens as you get into the fixer-upper.  Hard to figure everything.  (4)  It Won’t Take Very Long.  You can be stalled waiting for workmen or supplies so things just “drag on”.  (5)  It Will Be Easy to Nail the Design Updates.  Good home design still requires both skill & judgement & things can go wrong.  Some updates are easy, but some take a long time.  JUST PLAN, PLAN, PLAN.