The same amount as a Left or right Lung .
I used to smoke in excesss of 100 cigs a day.
Was told 3-5 years either lung removed or get myself a modded wooden box!.
I dont keep records as its a hobby and the cost to me is not important although that doesnt mean I pay through the nose,At a ball park id say ive spent as much or prob more than you did.
I work stupid hours 100+ a week ,so the car is my release from the stress of work.
I enjoyed my spot of fame and glad I won something for all the effort put in by all who help build it .
Antony