US index funds. Any Boogleheads in NZ?

Hi.

I’m interested in investing in index funds for the long term. Of course the best ones are in the US, VTSAX specifically. Looks like I would be able to invest in something very close to this through Hatch.

From what I’ve read, Hatch takes care of tax in the US.

However a couple of pitfalls seem to be obvious to me.

The first being the limited amount of liability cover, with your Hatch account being insured only up to $500,000.

The second being estate tax. As NZ has no estate tax agreement with the US tax would be 40%. Yikes!

Has anyone looked into this further? And other ideas about a long term index fund investment?

Thanks very much.