I've tried to self host myfcroft but after tinkering with it for about 3-4 hours I gave up. They provide little to no information for self hosting. Sure, you can use their pre-built docker image but you still have to create an account in their cloud and connect to it. And their privacy policy is not so great imo.

I did figure out how to do it at one point. I think you had to remove some default config from a JSON file to stop it connecting to their cloud. You still had to query Google directly for the STT though

I believe they hired the rhasspy dev though and he's been trying to change this for the better.

We'll see if he gets anywhere...

Without detracting from OP's efforts, also see Project Alice. https://github.com/project-alice-assistant/ProjectAlice

It is self hosted, offline by default, with options to use various ASR and TTS engines, some online, depending on your own privacy, performance or quality choices. It's quite mature and the maintainers are aiming for a 1 0.0 version release. I have been running it as the primary voice interface to my home automation system for years.

As someone else said elsewhere, there are a few assistants around now. Perhaps there is some benefit for sharing of resources too, as all struggle for contributors.