It’s not that it’s not affordable, I had 2 of them in my garage 1 month ago, i removed both, and now i have one again.
It’s that when friends come over at my place to play Forza 5 in split screen against me, they can’t have what I consider to be one of the most important experiences of the game - modern GP.
It would be a nice addition if the game, when a guest account is signed in (no actual gamertag), would make your own garage available to that guest for split screen racing.