Started a fresh character yesterday, got the 200K apartment and been collecting cars ever since.
Also, the mission "It takes a thief" can go and get bent. You have to repo two cars for Simeon that drive around in it, but neither of them are GPS trackable and they have no zone limits where they happen to drive, I chased one of them all the way to Blaine County. Here's
a pic of my car after finally killing the second driver. Having to evade 3 stars worth of cops just topped off the dreadfulness of that mission... that scripted warp 5 pushing animation that the cops do on you is just so much fun while trying to chase an AI car yourself.
IMHO, the repo missions where you need to capture a moving car in general are boring and overly long unless you get lucky and the AI happens to get stuck somewhere. It wouldn't be so bad if the auto-aim worked while driving (where it would actually be really useful and needed) but no, manual aiming is all you get while pulling off a high speed chase.