If you have any decency, get rid of most of it, preferably to charities or political causes.
That sort of wealth in the hands of a single person is obscene, and spending it on luxury when there are people starving and homeless in the world is the height of immorality.
The cost is just money in this case. It doesn’t use rare or unethically sourced materials (at least if you’re not a vegan), it advances the biological sciences as a whole and it’s something to do for bio grads that might generate a lot of value for society in the future.
Once you display an idea in public, it belongs to anyone who sees it.
Better mod tools and more quickly