Hi michael
I do agree with wogboy.
I was very lucky to have a great wife who let me race for 11 years,but please take into account the vechile was datsun 1600 with the good old l series engine[a very reliable donk]set of side draughts maybe a cam and off i went racing.it cost me brake pads,clutches and tyres and i would give the old girl a engine freshen up every 2 years and that little car would sing it's head off all day.
Today it is alot different with gtr etc big bucks to set up and make go and when they brake more big bucks,the biggest problem is the availability of well priced parts ,so what happens is while the engine is in bit i will replace not just the broken parts we tend to buy better and more exspencive parts.
I am talking from exsperiance my engine rebuild started at 3-4 grand then 3 weeks later became 6-9 grand and blew out to 11-12 grand what a great wife i have.
The one thing i have now relised my entire 11 years or club race revolved around the car and i worked every week end to support my hobby,wife and children,the racing involved both my girls as they grew up but i missed alot of ther growing up because of it and that also ment my wife picked all the pieces.
In short you should do what feels right for you and others around you.
Also thanks for the parts today,i had a great drive to and from your place [no wildlife ]
stuart