As for the Orrery, if you want it fully leveled you need 11 grand prizes if you have the surprise box, 13 without it. That is 362 / 426 tiles. On average a dice will give you 3.5, so that means you need 104 / 122 dice rolls, or 10400 / 12200 paper money. As I go over in my previous post, you will have 80 dice rolls from the free event currency, + whatever you gain from incidents/newsletter/minigame rewards. So if you plan on spending all your currency on one day for a daily special, you're probably looking at around 90-100 dice rolls, for around 300-350 tiles.
That will be more if you play daily. Someone correct me if I'm wrong, but I believe the first time you land in the upper-right corner on a given day you get a gold dice, so if you spread your event currency over 11/13 different days that is 11/13 free rolls (still only worth 3.5 advancements each, as you can't impact how close to the gold dice you get each day). The daily goal will add 40 paper money per day, so 840 over the event if you play daily, or another 8.5 dice rolls. So that's another 70-80 tiles. You'll also have 4-5 more gold dice that you can use for 6-rolls, so that's 24-30 tiles. So around 100 additional tiles, for around 400-450 tiles total.
This will also give you a few daily specials (3 on average) from the daily goal - but you have little control over which daily specials you get, and you also lose daily specials by not always having the +5%. Definitely not worth it over spending all currency on 1-2 days for daily specials you truly want if your focus is daily specials.
So, if you play daily you should be able to get the Orrery fully leveled, but if you want to spend all your currency on one or two days you probably won't be able to, even if you have the surprise box. If you're lucky it's possible, but no way close to guaranteed.
I definitely don't think an event celebrating the 10th anniversary of the game should make players decide between daily specials or the main building - out of any event to be generous on this is it!
That will be more if you play daily. Someone correct me if I'm wrong, but I believe the first time you land in the upper-right corner on a given day you get a gold dice, so if you spread your event currency over 11/13 different days that is 11/13 free rolls (still only worth 3.5 advancements each, as you can't impact how close to the gold dice you get each day). The daily goal will add 40 paper money per day, so 840 over the event if you play daily, or another 8.5 dice rolls. So that's another 70-80 tiles. You'll also have 4-5 more gold dice that you can use for 6-rolls, so that's 24-30 tiles. So around 100 additional tiles, for around 400-450 tiles total.
This will also give you a few daily specials (3 on average) from the daily goal - but you have little control over which daily specials you get, and you also lose daily specials by not always having the +5%. Definitely not worth it over spending all currency on 1-2 days for daily specials you truly want if your focus is daily specials.
So, if you play daily you should be able to get the Orrery fully leveled, but if you want to spend all your currency on one or two days you probably won't be able to, even if you have the surprise box. If you're lucky it's possible, but no way close to guaranteed.
I definitely don't think an event celebrating the 10th anniversary of the game should make players decide between daily specials or the main building - out of any event to be generous on this is it!