Again, apparently depends where you drive. I've never seen a modified driver spend 4 times as much money as a stock driver, not even close to that. On the contrary, in my experience - unless we're talking about a very strict spec class - normal stock classes can often become even more expensive than modified. Ok, you wear down tires more quickly in mod and you need a bigger ESC. But in mod there's not nearly as much super light, super low resistance parts, no motor of the month, no ultra-high grade batteries with 40A capable chargers, etc.