EXTREME Legacy Challenge

You cannot sell any item your sim makes or collects unless it is a double e.g. you have two dirt frogs and one leaf frog you can only sell one dirt frog

So you can sell items your Sim makes as long as it is a duplicate?
To avoid potential problems with a bloated inventory can you sell things (anything) then deduct the money earned?

No breeding frogs

Would there be an exception for the Curator Aspiration?
What are the final goals needed to complete the challenge?
Are there a certain number of generations?