I go to Boise a lot for work.
I wanted to get into rental properties a few years back and started saving aggressively for a down payment. At the time, you could get well-kept ranch SFHs near BSU (great location) for ~$300k. 3 years later, those houses are $550k.
Another issue with Boise's explosion is that the road infrastructure is way insufficient now IMO. Some will suggest others, but you've got I-84 for freeways, and into/out of downtown is the redlight hellscape that is Broadway.
Also, right now, flights in/out of Boise are undersized vs its growth. Unless you're going to Denver, Seattle, Portland, SF or LA, you won't have tons of nonstop options, and the ones you do have - and can afford - might be pretty inconvenient. Something to think about if you fly a lot. If I have a connection, I intuitively understand there's a 50% chance of there being a snafu somewhere on my trip.
When TC says he's not into city living, Boise isn't much of a city, and there are lots of outdoor oppos without having to leave. A lot of residential housing, with yards, is in the city too. If that's still too "city," there's tons of rural options as well.