High Poly Vehicles and Pedestrians

What would it cost to get a collection of high poly vehicles like the BMW that UE4ArchViz did for their vehicle customization package?

Looking to create a realistic city with realistic looking pedestrians as well. If someone with much more experience in this field have any thoughts about acquiring this level of variety. I have funds to purchase a whole bunch, but not looking to spend an insane amount on that variety. The same would go for pedestrians. If there are packages out there that I can get access to for free or reasonably well priced packages, please do let me know. I looked at the Unity Assets, but they feel a bit too low poly for me.