I'd really like to see some numbers on how his (Bezos) wealth breaks down, so I'd prefer more than your word on the matter. Beyond that, much of what he owns isn't just land, but is also real estate (homes, apartments, offices, the like) as is shown in the first posted article.
While we're at it, it's interesting to note that much of what has Trump's name on it isn't actually something he owns.
He's a big fan of licensing his name and having no other involvement beyond that, which gives the illusion that he owns more than he actually does. This article
in particular has some interesting things to note- particularly the latest assessment by Forbes of Trump's net worth. Trump himself states his net worth (depending on the day and his mood) between 8.6 and 10 billion dollars when you include his "brand". The Forbes assessment actually says it should be 3.2 billion, which puts the "brand" component at up to 5.4 or even 6.8 billion dollars- a much larger portion of his wealth than his real estate holdings. Doubly so when in the same article, Trump says his brand is worth 4 billion. So, no, according to Trump himself and the other sources available
, most of his wealth does not come from real estate, local businesses or casinos. It comes from his brand and licensing.
I also find the idea of only land and real estate holders having the ability to vote quite disturbing. I'm at a point in my life where I'm able to put time and effort into researching candidates and politics, but I don't have the money necessary to own real estate. I should not be prevented from having a say/having my voice heard just because I lack the funds to own something almost entirely irrelevant to most of the issues I care about. Since people who rent also don't own real estate, we'd lose many votes from the cities which would disenfranchise a great deal of minorities. Such a plan says that anyone poor, young, or not white, doesn't deserve a say in who represents them, even if they vastly outnumber the people who would be left with the vote.