Well, considering I got like 12 runs out of one bottle refill (sometimes more), I could usually go at least 2 times to the track without any problems. So, one bottle would usually hold me off for a week or so....Obama math....Thats funny! Then, you can get the bottle refilled for like $40 almost anywhere on your way to the track or on your way home from work....It's like a payment plan. And the payments are only as much as you wish to make them. If you haven't any money, then you don't need to race too badly. You can always ask a friend to use their bottle also....Also....If the NOS kit breaks (yes, the solenoids go bad every few years) you can replace the individual part....Usually for less than $80....Try THAT with the Turbo. Also, it can be removed at any time....The turbo will take you at least a day or so to remove....If you still have the original parts still. LOL