Still counts. As long as you would have bought the vehicle for your own use anyway, it's a sunk cost. Whether or not it's profitable to rent it out via Lyft dep

Still counts. As long as you would have bought the vehicle for your own use anyway, it's a sunk cost. Whether or not it's profitable to rent it out via Lyft depends solely on the incremental costs of the extra driving -- not how much extra driving you do. And if it is profitable, then driving more is more profitable, not less.