Why is it so hard to just talk to your wife or significant other before you buy things? If she pitches a fit, then ask her why she is upset, explain to her what you want out of this hobby, and if she still doesn't agree then maybe you come to a compromise that you start as bare bones as you can and build up. Seriously, nothing can be more stupid than to hide purchases from your wife. It will only cause conflict and unnecessary fighting than if you had come out with it in the beginning. If she doesn't understand your need to have a hobby and want to take an interest in what makes you happy, then you have a much deeper problem than just money issues. That being said, if she has hobbies of her own that you have put down in the past for her to spend money on, then you deserve ridicule from her too. One possible way to divert her anger would be to ask her what she wants to do for a hobby. Don't be selfish here. If you get to spend money on a hobby, she should as well for something she enjoys doing. Maybe that means you cannot get that extra carboy this month or some new gadget for brewing that is not necessary but nice to have. I just do not comprehend how people think they are in a healthy relationship with someone when they have to do something as childish as hide purchases and intercept delivered packages so she won't know and get upset---she has a compete right to be upset at you. Grow up and talk to your wife about your interests. Is she is so uncompromising, then there are other issues you need to deal with and home brewing shouldn't be your top priority.