Hi vfam2player.
You upgrade career rooms on your iOS device by:
- Tapping the "Store" button.
- Next, tap the "Career" category.
- After that, tap the upgrade item you would like to purchase (assuming it's unlocked and your peeps have enough money to pay for it).
- Lastly, tap the "Buy" button.
You will then be taken back to the main scene, your new purchase will self-install and all of your little family members will run to see it and celebrate the upgrade. They love getting new things!
You really should check out:
Helpful VF2 iOS Tips & Answers and
[SPOILERS] Fires, leaks, clogs and more!. It will help you with many things you're wondering about.
Good luck and enjoy your little family!