I don't have a cute answer, but here's my advice:
Your wife is more valuable than all your mammon. If you're neglecting her needs, there is no amount of rationalizing that will win an argument or resolve a conflict. Since this isn't the place for further advice, the remainder of my comments will be about the ammunition, but there is no solution to a different kind of problem.
The amount of ammo it makes sense to acquire and store depends on what is a practical budget for you to shoot. The more you shoot, the more ammo you should have. But if you were shooting 1500 rounds a month, it shouldn't be remarkable that you have at least ten months supply stored up, unless your wife has been completely excluded from everything you're doing with firearms. Some people shoot 1500 rounds a week, every week. Some people that are still gun enthusiasts and keep a lot of guns, might only shoot 150 rounds a month. Buying ammo and components in bulk saves you considerably versus buying in small quantities. But if you're 75, your only income is a social-security check, and you shoot 150 rounds a month, 15,000+ rounds is enough.
For me, 15,000 rounds is more than a year's worth of ammo, maybe two years or two and a half. I'm shooting less in 2020 because I'm not going to classes. I do not load ammo that far in advance. Instead, I keep the components on hand and load no more than a few months need at a time. That gives me more flexibility to make changes. So I might only have 1500 rounds loaded, but I've got the components for more than 20,000.
Prices aren't likely to go down. Fear-buying is going to continue to result in shortages and increasing prices even during this disinflationary period in the economy. In a little while, we'll see inflation worse than it was in the 70's because of all the currency-creation that's been happening. If there is a credit/debt crisis, we might see the dollar rise temporarily, but at some point we're going to need the wheel-barrows. Stocking up on commodities that maintain a store of value over the long term could make some sense. Ammo, especially reloaded, doesn't have the most practical liquidity under likely circumstances. I wouldn't store it for future trading, but just for personal consumption. There might be some survivalists out there that think ammo will become a medium of exchange. I don't have that much confidence in the apocalypse coming soon and I'm much more sure that I'd have a hard time rationalizing a hoard that way.
