Phase 1 - 6-8 holes in Zone D, 10-15 holes in East Zone, approx 20 holes total. With 3 days per hole average (IR said 2-4 days per hole), that is 60 days. If they have one drill, that's two months. With 2 drills, that's one month. I have no idea if they would have one drill or two for Phase 1.
Phase 2 will be lots of holes, 100-200? Starting in September and finishing late October, they would perhaps need 5 drills. The number of holes and drills needed for Phase 2 is more of a guess at this point, don't crucify me, I am only answering TR's question.