Luckily I don't have that problem(counting our money spent on the car) but I do get the occasional raised eyebrow!
I gave all to wife, kids & house for around 25 years, never had time for a hobby, now I figger it's my turn, I have to watch the money, not rich other than in name, but I don't know if the wife really knows just how much I did spend in the last 3 or 4 years, it's quite the sum, if I would have waited & saved that much, I could have bought a finished very decent car & had gas money for quite a while!
Of course I would have missed out on all the FUN I'm having building it! Rich.