Yeah I agree with all your points mate - No idea when it will be released, so have to wait and with the chip shortage and looking at how the dealers demand crazy money even for the currently released brand new cars in the US or Japan, it will be expensive. Chip shortage though is said to ease out around end of this year, and going into 2025-2026 so there is that, even in the West/Japan, new car and used car prices these days are very unsustainable, and will come back to some form of normalcy over the next few years.
So I believe with these permits, you can claim it and keep it for some time - If and when I do this, I'd do this in 2 ways depending on what option is most cost effective:
1. I could import the car new using the permit, through maybe either C#lonial M#tors or even Unit#d Mot#rs (Who we have a relationship with because my mum imported a Montero with them previously, and we also personally know the shareholders there).
2. Sell the permit (Or might even be able to use the permit on a below 2 years used car, I'm not 100% sure of the law here, I have to check), go to Japan together with my wife (I've always wanted to go there anyways so I wouldn't consider it an additional cost to buy the car, to visit the Nismo factory, check out the car scene there, catch up with my friends there and hopefully and do some sight seeing) and attend some of the auctions to get a 2 year old used RX9 and ship it here (I don't particularly believe in buying cars brand new, I'd be perfectly happy with a used one with a clear accident and maintenance history).
What you raised and what Matroska raised are all concerns I have for sure - But I'll defo give it a shot and see how it goes!