And to continue your logic, if you buy a new car for $20k, it's entirely possible through neglect and failure to follow manufacturer's maintenance requirements that you'll end up with a car that no longer works and requires at least $6k to get the engine and transmission back into good shape again.
R < B
and
R (is proportional to) B
The pattern being that sometimes things which are expensive to buy are also expensive to repair. In a gas-powered car, the engine+transmission is probably the most expensive component to brick and replace. In an electric car, it seems to be the battery system.
Neglected maintenance on a $500k house can easily create situations requiring $100k in repairs or liability.