We split household expenses but keep separate accounts. Her only “rule” is it has to stay in the garage. I do run big purchases by her but for the most part it’s my decision. Same goes for her. She buys a lot of stuff I don’t agree with but I’m smart enough to keep my mouth shut
I got a lot of heat when I bought the ‘72 but she understood once I got the truck on the road. I do fib when it comes to the price of parts.
The worst conversation we had was a couple of months ago when I bought a ‘67 parts truck without telling her and I didn’t have room to put it in the garage. My saving grace was I had a fire sale on the way home the night I bought it and had all the parts I didn’t need gone by the next weekend. She was fine with that.