What happens if you dont give karol one million dollars to buy his garage in midnight club los angeles?

If you don't pay Karol/buy into the garage, everything in the garage (including cars & paint jobs) won't be free to you like it all would be if you did.

Tags: midnight club: los angeles,  garage,  cars 
Thursday, February 02 2012
Source: http://www.gamespot.com/xbox360/driving/midnightclublosangeles/show_msgs.php?topic_id=m-1-47434235&pid=939535