I grew up wanting a fast car and lots of powersports toys, now that I am in a position to afford some (small amount) of that, I find myself thinking more that its not right to spend on those kind of activities now due to the impact on the environment.

Exactly, as I begin to be able to afford some smaller luxuries (say, a higher-end computer part or an extra monitor) I realize that I morally object to many luxuries because of their environmental cost, e-waste, and thinking of better uses for that money.

I do believe there’s some truth to the slogan of “no ethical consumption under capitalism” but luxuries are so often just egregious and repulsive.

If I’m reading that correctly, it also comes with a mini-submarine.

At an estimated cost of $605 million, the ship cost approximately $100 million more than the third-largest private motor yacht, Eclipse.

The luxyachts maintenance calculator suggests it could be $10-20 million per year just to maintain it.

Buying an island:

https://www.privateislandsonline.com/ lists many islands. They’re between about $100,000 and $75,000,000 (some lower-end ones are undeveloped and just trees), most seem to sit in the millions range. There are also renting options but prices aren’t public.

This advertisement blog post shows similar prices: https://www.jamesedition.com/stories/real-estate/how-much-does-a-private-island-cost/

Mega-yachts.

Here is a yacht buying/selling website with a filter for mega-yachts: https://www.yachtworld.com/boats-for-sale/type-power/class-power-mega/

The most expensive ones listed there are in the lower hundreds of millions (US$). I didn’t check if these were new or used. The smallest ones I would start to call mega-yachts were mid-to-upper hundred of thousands.

There’s also this calculator site for the purchase annual operating expenses of superyachts: https://www.luxyachts.com/yacht-cost-calculator