The DTD is mostly there for making sure the suit fits you since it makes a near-perfect copy of your own body when made properly.
It's perfectly possible to make one without one since you can take and make measurements of yourself as needed unlike when you're commissioning someone to make a suit for you.
According to some site, ~4-5 yards of fur is about the average for making a fullsuit. Like mentioned before, it's better to get too much material than not enough.