I don’t know why so many people (I don’t mean on this Q, I am talking in general) always say money doesn’t buy you happiness and family and health are the most important thing. Money absolutely can buy you some peace of mind, feeling of control over your life, autonomy, and independence. I do agree that health and family are the most important because without health no amount of money can help; unless of course money will help. Buying health care and medicine can cost money. See, that’s the thing, in America money can bring more free time to spend with family, safer living conditions, even better health.
If you have ever lived check to check you know how horribly stressful worrying about money can be. Add $10k more and suddenly most of that worry goes away. It’s a weight off. It probably lengthens your life as that stress is alleviated.
People with more money tend to eat healthier foods whether it be at home or out. When something needs to be fixed you have the option of hiring someone if it seems daunting. Get a maid so you and your spouse don’t argue as much about chores in the house.
There have been several studies showing money does seem to buy happiness to some extent. @Judi linked one I noticed.
If I answer the main question directly though it would be basically the same as @janbb enough for living expenses and some treats, and I would add and some savings. Although, when I am older I won’t care about adding to my savings hopefully. My husband has an expensive hobby, if I don’t include his hobby with $80k net we can be quite happy. We can live on less. We actually spend a little more. His hobby is an average of $15k a year on top, but it is an extravagance.