Those are valid points , thanks for bringing them on
I would agree that if I want to build a small condo on a small parcel it makes ense to buy from builder (money savings are not going to be enough compared to time loss)
But if I am looking at 1 acre+ 4-bedroom house say brand new, those are going to be very expensise since the demand is low and builder profit margin is greater
The higher you go the greater the profit margin, the easier to fall under builder price IF you do it yourself.