I wish one of this two ideas. One when you beat a show case vehicle that it would be parked at your house or two you could have some of your favorite cars parked outside of your already owned houses. And with you favorite cars you would basically use a program like event lab does and you can customize place your cars around your houses.
So like in Project Gotham Racing where you could place cars at certain spots around your house or garage? That was cool yeah. Wish we had that in Horizon as well.