Pay someone.

Seriously.

They'll be loads of unexpected things that come up that can't be anticipated.

Just look at some of the websites that were abandoned in the early 2000-2010s but which are still actively hosted today but that are broken now due to modern browsers refusing to load cross-origin resources, or the server's ciphers are no longer accepted etc. They're still online, you just can't see the content with today's computers. You need a human (...or potentially an AI?) there to intervene and resolve those problems to keep it going.

Sure you might say well my writings are not using HTTPS or I don't make cross-origin requests, but that totally misses the point. Who knows in 50 years you may not even be able to read ASCII text in consumer browsers any more without specialist archival/library tools, just like we can't use what we're at the time totally legitimate SSL ciphers.

I think that archiving your writings is different from having your site active and casually available.