I would check out the DD thread to help you with your purchases as it has some helpful links to other threads
The Daily Deals thread has links that will help you with deciding on when and how to buy certain sets.
https://forums.thesims.com/en_US/discussion/comment/14402866/#Comment_14402866
If you use mods and if you should get the bakery, NRaas as a mod over there called Cupcake that will restock the bakery shelves and do the baking.
Here is the FAQ for the Cupcake mod.
https://www.nraas.net/community/Cupcake-FAQ
Hope this helps... :)
