Common What is Your Smallest and/or Largest of Collections?

[Xilikon]

Same here, I built a lot more passenger buildings in my city. Even if hardly 30% get used during normal flights, it's perfect when doing adventure flights as I need a lot of passengers in a short timespan.

Now built 6 Aztec Pyramid and it's getting crowded. When I get the next 6, I'll start getting rid of coin producing buildings.

 

[Wired Parrott]

I guess I forgot about treadmills being launch prep collections as they aren't as easily collected as the items from planetariums. Soomitting that I would also have to go with the dino and chess club. My smallest collection that I have many of the items for except 1 would be the luggage cart from the ready for the journey.

As for all the other things I started with my other post, apologies @KenDuckySmith was not my intention to hijack your post.
But yeah I love me some mini metro stations. Just wish I could guarantee which one I get as I'm at 6 of the red station so it is
a luck of the draw getting others at this point. Probably has to do with buying the 5.99 green package for most of them. Yes @Captain WH Rollins I get a million coins from coin producing buildings around every 40 days. Nothing like my planetarium visits but they help, though you have to have loads of the suckers.

 

[Captain WH Rollins]

I guess I forgot about treadmills being launch prep collections as they aren't as easily collected as the items from planetariums. Soomitting that I would also have to go with the dino and chess club. My smallest collection that I have many of the items for except 1 would be the luggage cart from the ready for the journey.

As for all the other things I started with my other post, apologies @KenDuckySmith was not my intention to hijack your post.
But yeah I love me some mini metro stations. Just wish I could guarantee which one I get as I'm at 6 of the red station so it is
a luck of the draw getting others at this point. Probably has to do with buying the 5.99 green package for most of them. Yes @Captain WH Rollins I get a million coins from coin producing buildings around every 40 days. Nothing like my planetarium visits but they help, though you have to have loads of the suckers.

I began to feel a little weak when I read the words - 'millions of coins'

Regards
Captain WH Rollins

 

[LAX]

I was just about to start researching that myself. (I secretly want one of each building. I have all but sold off all multiples of anything coin producing)

I know that there are definitely better strategies than the one I use, but I like having every building available in my airport. I don't know for certain, but I would guess that I need only 5-15 buildings that are available in the iOS version of the game, and that includes reward buildings. Unfortunately for me, there is one building that I will NEVER be able to get - the Christmas tree reward building. To my knowledge, it was never available after the very 1st Christmas event and that was when I started playing. That is the only reward building that I am missing!!!