So how would you do it?
But really, then you have to host it, and manage it, and ... the DNS is really not the hardest of your problems when your adversary has "$50-100k or more" to spend on finding you.
The degree of censorship in play right now is breathtaking. I've spoken to some youtube content creators and they are wary of multiple keywords. One mishap either deserved or not can nuke your channel. Without much explanation. Or recourse to resolve it in any useful way.
Domain registration is just one element. Next you'll need web servers, email etc. Hiding details as seen by WHOIS is an obvious protection that isn’t rare anymore.
You can then use a fake email for registration and fake address details.