That's to help fund the doghouse he'll need to build for himself, right?
Realistically, this did work fairly well with my previous relationships. My exes had some
very expensive hobbies - one collected dolls worth multiple thousands of dollars, and another was a fellow musician with a collection of saxophones, piano, cello, charango, etc... They sometimes made what I spent on instruments look like peanuts!
It also made my divorce very easy - you don't touch my guitars, and I won't touch your dolls