GTA V heists face bandanas

Figured it out. Part of the problem was that the server situation on day one was preventing texts and calls from Simeon from triggering.

As you level he sends one telling you about purchasing a garage for your car. This happens at around levels 5-6. You can find all the properties by going to the in-game website: dynasty8realestate.com. The properties will also show up on the map if you drive close to them. They have a symbol that looks like a house; it's also very similar to the convince store icon.

By level 10 it looks like most of the available content has been opened up.

Heist are currently not available, and will arrive in a later update.

For the 10 million GTA$ challenge you need to finish all 5 heists on hard with the same crew in a row, you can always start fresh from the Fleeca heists once you have completed all heists.