DeletedUser8471
Guest
You actually get two cider mills (one after first and one after third series of quests. And everyone will get minimum of 4 upgrades - one after each second and third series of quests and 2 as grand prize which everyone will reach if you finish all three lines and if you motivate/collect apple trees daily. Trust me, everyone will.
You MIGHT get lucky and got third grand prize but I seriously doubt anyone would get that without diamonds, the math simply doesn't add up and you MIGHT get lucky to win more upgrades as daily special as well as more cider mills.
Prizes from quests: 1480 Apples
From Aiding: 48 max/day, which comes to 1152 over 24 days (assuming you have at least 80 on each list with no doubles)
From Trees: 2/Tree (minimum) assuming 240 players Aid back that's 2304 over 24 days.
Add that all up and you get 4936 Apples.
According to the wiki the grand prizes are at 1000, 1200, 1500 and 1800. Add that up and you get 5500.
The difference is 564 Apples needed to get the *Fourth* Grand Prize. That's an additional 23.5 Apples needed/day, and since Trees drop 2-5 Apples you would only need a couple of lucky trees to max out and obtain the Fourth Grand Prize.
So getting 6 upgrades is possible without spending Diamonds or winning from chests, but you would need to be lucky and pray all your list mates will Aid you back and plant enough trees. 5 upgrades are most certainly possible being heavily active.