@David Trujillo If I may add my 2 cents to your question from my experience (though limited), it would be to compare different markets that you might be interested in. I invest in the south of the Netherlands, in Europe and we see the same thing here that property prices have gone up insanely. Personally, I believe this is happening almost everywhere, but that also brings along opportunities: For example, for some units we own, we are able to ask €100-150 more per month compared to only a year ago.
So, my advice would be to compare different markets you're interested in, not only price per property but also which investment strategy and which market is most lucrative, and maybe you'll find that in the end Denver might still be most interesting to you in terms of ROI.
But great question! It got me to think myself and I've seen great advice from the others here.
Anyways, I hope my addition was of any value to you!