Joe the Plumber is from Toledo, Ohio
But well. 2 things in your analysis that I don't quite agree with here in another Scandinavian country
1. Buttigieg's main "problem" isn't so much being gay, Almost 90 % of democrats are open to voting on an openly gay person according to Gallup and even among Republicans it's up to 60. Sure there are some who won't. But the main issue is minority votes. We've seen polls in the past where he's at 0 % of black votes and below 5 among latinos. That doesn't win an election. A potential Biden collapse (though it is certainly looking that way, I'll be waiting for South Carolina before calling his campaign dead).
2. Unelectable Sanders? That's a question of who you're asking.
He was the highest at perceived electability after the NH debate and (though they shouldn't be used too much at this time) he is winning most polls against Trump, very often at the top of the democratic field. Meanwhile the super delegates are still pretty quiet. The endorsement's doesn't show the same opposition as 4 years ago (though the diversity in the field does make it harder to foresee)
Electability is hard to forecast, but I don't think that's what the Democratic establishment is the most worried about when it comes to Sanders. It's more a question of him moving the party too much, especially considering that he's only really a Democrat when looking for the nomination for president. Questionable as it may seem, it's really not that strange to be frustrated about somebody joining just to become president.
But generally:
It feels like a brokered convention is coming up (but that's been said at early stages of other primaries as well), but it could change quickly. Bloomberg is getting more and more attention (not just for his paid ads) and with Biden still likely to get a major amount of delegates (Buttigieg and Warren in contention for a bunch as well), it could get very tough.
Will be interesting when other super tuesday states will follow Arkansas giving us polls. It's getting closer