It avoids the CA franchise tax, is scalable so you can add multiple assets under it while benefiting from the liability minimixation structure of child series' , and it can streamline your operations by using one set of books, bank account, etc.

Sourcing deals yourself with direct marketing sounds like a great way to gain sufficient volume for a scalable business

Also most of the good designers are very small businesses so they are busy (because they are good) and their business is not scalable so you have to wait a while.