My late partner & I faced this 10 years ago, though we couldn't get legally married in Texas or any state we lived, just a concept in our own minds.
Engagement ring: He surprised me with an understated diamond one, dropping to his knees during dinner at his place to propose (so corny yet so lovely & touching). Since he took the initiative on that, I bought us matching wedding rings almost immediately, so I never got him his own engagement ring (a question this article doesn't address).
Wedding: We never had one, nor a commitment ceremony. But should my present partner & I now go to NY for one (something we're considering), we'd be without our Florida friends, so probably just have a simple civil ceremony in front of a judge or justice of the peace, with whatever witnesses we could find. Unless some friends want to fly up with us.
In an ideal world with a marriage in our own community, we'd either come down the aisle together, or separately with our Best Men/witnesses. Of which we'd have 2. We'd pay for it together, of course (though charging admission is always a temptation).
Another question not addressed in the article is what to wear. We'd both wear black tie for a late afternoon wedding, neither of us considering doing drag (though both of us have done comic drag). We don't see our relationship as man - woman, but rather man - man, and that's how we'd be married.
BTW, technically I could be married in my US Army officer's dress uniform, being officially retired, but I'd need to have a new one made, as the old one no longer fits. And it would make me too much the resplendent "peacock" when we should appear equals.