Married guys - car budgets and honesty

Marriage one: Epic failure- Joint account - not a car chick.
Marriage Two: Still joint account but is a car chick. loves her Classics.

I do a big XL spreadsheet and overprice everything and then go over it with her while walking around the car.I get her involved as much as i can by asking her to clean parts in the parts washer, painting bolts, wire brushing stuff. etc When im looking at parts i usually have 2 options in mind so i ask her what she thinks and explain the pros and cons to each choice. This method seems to work well and she enjoys our time in the shed. I usually sell cars i have laying around to fund build projects.