I would assume the parking garage has 30 spots, one for each person in the session, and the personal garage has 10 slots, but 3 purchasable floors (not dissimilar to the Office, Nightclub, and Arena garages).
Then there will be a personal garage, which the neswire says can at least hold 10 cars based on their wording. It seems there will be a parking garage for all players to park together, car meet style. Well the parking garage and your personal garages are two separate things. you MUST exit the casino and look at the vehicle icon on the minimap and go to it (don't use any other vehicles on the way there, just in case that could screw it up) you MUST buy a garage and drive it. Seems like we won’t know until Tuesday morning, but it’s a fun discussion. the vehicle spawns outside the casino and becomes your personal vehicle. I have a master plan of how I want to move all my cars around, plus add in the new ones, but it assumes we’ll get at least 30. It’s on par with both the Nightclub and Arena updates, and the DLCs have had 20-30 cars.
Personally, I’m hoping for at least 30 spots. What’s everyone’s thoughts on how many parking spots there will be in the garage? I know I saw something that implies ten spots, but maybe that’s just the base level that comes with the penthouse, and you can add more?
