@SaltySnows No, this isn't possible. Sims 3 for console is an entirely different game, despite sharing a name with its Windows/macOS analogue, and is treated as such for ownership purposes. I would suggest waiting for a sale, which typically brings the price of the Starter Pack (base game, Late Night, High-End Loft Stuff) down to $10 or less. Unfortunately, the most recent sale ended a day and a half ago, but there should be another one in a couple of months.
In the interim, the Sims 4 base game is free to play. It's not at all the same as either version of Sims 3, but it might help you scratch that Sims-related itch. If you try it, be sure to pick up the currently-free Backyard Stuff pack too.
