I don’t have enough Bitcoin (yet) to borrow for anything significant, but this is my ultimate plan. When I get enough Bitcoin, I would borrow no more than half its worth (in case the price drops), and then I would still have Bitcoin along with whatever property I buy with the borrowed money.
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Does anyone else plan on doing this?
You are late for this. This is so 2021 what you are saying.
The one who popularized this last year was Michael Saylor, to the point of recommending to people that if you have a paid off house, take a mortgage and buy Bitcoin with the money they give you. Soon other Youtubers jumped on the bandwagon, like Max Kaiser.
The problem is that we are in 2022 and many of the entities that allowed you to borrow against you Bitcoin have gone bankrupt, and people who had deposited Bitcoin in them, to borrow against it, for trade or other reasons, have been left without their Bitcoin and we will see if they get it back.
Remember: "not your keys, not your Bitcoin".
If you acquire a significant amount of Bitcoin it is much safer to sell or spend small parts than to borrow against it, even if you have to pay capital gains tax. Better to pay tax than to lose your Bitcoin.