Forget about a tech hub, what city with jobs at all. Ten acres is more like a small farm than a house, by definition at that lot size almost nothing can be within five minutes, lol.

My area almost qualifies. Right now there is a home on 1.16 acres going for $275,000 that is 7 minutes away from my employer and 10 minutes away from a rather large employer.

We have sort of a specialist tech hub here, featuring stuff like radar and cyberwar. Lots of these companies are hiring. (mine: https://news.ycombinator.com/item?id=18819736)

You can get more than ten acres if you are willing to commute a bit. I think 2.5 acres is the minimum lot size if you go south about 14 minutes from one of my workplace's buildings, or 22 minutes from the one I'm in.

It is a small farm. Senior engineers can afford to live on hobby farms. Some of them expect to do so. It's not just here either; I've known people who did that in relatively rural parts of Massachusetts and Virginia too.

I recall somebody on HackerNews proposing an interesting explanation for how people react. The available jobs get dismissed because you'd have to seriously consider moving (which is annoying) if you admitted that employment in these locations is viable.