What was the summer event this year?
I think I missed it.
Evolving items is a good idea, but there to expensive to buy aswell as getting donation items.
Some of the items I see there in the market place is sometimes overally placed.

I tried to do the quests of trying to buy every item there and failed because just about every other day / Week the would realese a new item,
You go to buy it and then it like 100K +
The aquarium annoys me because you have to pay out your pocket for something that will die and no longetr have.

I found a good way of making money and that was for me to get a fishing bot, it works wonderfully but I just make sure I am carefull with it.
I can sometimes make up 50K a day.