I wish I did all this a year ago.. But I bought my duplex in 2019, and I wasn't even really aware that building was an option for us, until we saw how our friends did it, but by the time we started meeting with builders, it was too late.. rates were up to 5% (or higher) and prices were still maxed.
We keep going through the pros and cons: Build, Buy, and wait.. and none of them stand out. There really doesn't seem to be a BAD choice, it's just a question of what's most important, and what you can stomach.
The absolute LAST thing I want to do is move into a starter home.. some 1200sq/ft, 3 bedroom/1.5 bath type house that I know we will just outgrow in 5-8 years, if not sooner. That's why i opted for the Duplex when I did, to let my tenant cover my "starter home" costs, and therefore, giving me that chance to get our forever home sooner than we thought.