I really think giving it a year for the hardware market to come back to earth and spending a fraction of that for API access to the same models is a better use of the money.
We have decades upon decades of hardware getting dramatically cheaper year over year for the same performance, and ~1 year of the inverse due to dramatic buildout for AI.
It's a surprising example of the recency bias to me to assume anything other than the market returning to its historic norm, even if the AI buildout doesn't slow, producers will scale factories to meet that demand.
10k in the S&P is by default a far better investment than some computer components. You could say the same thing like "you buy a car and I'll put my money in the S&P and we'll see who's happier in N months". We were speculating on the cost of components going forward, not on whether the S&P is better place to park 10k.