Consider yourself lucky that you have a wife that wants to spend time with you even after 35 yrs! I suggest you set date nights where she can have your full attention- I mean, really listening and having dialogues not just nodding while thinking about how you'll hold your next work piece on the mill.
As for budgets, don't set one budget forever. Budgets change as you progress. Believe me, if it wasn't for my need to acquire new hobbies every couple of years and then buying all sorts of crap for them, I'd have been retired by now...well the hobbies and the divorce killed that dream lol Lately it's been machining and I've bought a ton of stuff because it seems every project I want to do I need 5 things that I don't own. Like right now I could really use a tapping head (for 60+ holes in a fixture plate) but I've already spent a lot the last couple of months and while I can certainly 'afford' one I'll try doing without it first. I still don't have v-blocks, 5c collets set, angle plates and other 'basic' things but I haven't had the need. My amazon wishlist is a mile long and gets longer every time I visit sites like this and others related to my hobbies.