That would take 2-3 years minimum, If you're lucky enough to hit the odds... twice...
I'd just pick up a Pin 100% Het Pied male and breed him to an adult/sub adult pickup 0.1 Pied when she was up to size this fall. You only need to hit the odds once with the 1.0 Pin 100% Het Pied vs. twice trying to make your own Hets then hit a Pin Pied the third year after your 1.0 Pin 100% Het Pied is big enough to breed (if you hit one).
Yes.... More expensive upfront, but a quicker return on your investment if you produce a year earlier- which basically negates the difference you paid upfront in the first place.
Say you paid $1000 more for the combo of a 1.0 Pin 100% Het Pied and 0.1 Pied over making your own Hets with two 0.1 Pied/Het Pieds- then say in the two years it would take you to produce in your original Het making effort, you could have produced 2 clutches. Your investment difference is recouped in the first year and you still have a 0.1 Pied which is worth well more than a 100% Het Pied.