[listaware]

For the domain name, aaronsw.com . It's currently not possible to register domains for more than ten years.

You could envisage some sort of way have putting the domain in a trust fund. Where there would be funds to renew the domain, you could potential show how much is in the fund, on the trusts's page. And as long as there is money in the fund, the domain would be renewed. The domain technical contacts, and possibly the other contacts too would need to be put in the trusts name so that they can renew with the registrar, and possibly change the DNS if needed.

As for the hosting, you could probably run a script that would take a static snapshot, and save the files in plain HTML. This of course gets more complicated for sites that use things dynamically with database backends.