This would involve a stream when using nginx as a reverse proxy, correct?

Well I have the vpn working but the connection seems to close after 2-5 minutes unless the client keeps talking to the server, at which point I have to ping the server from the client to re-open the tunnel. Is there a way to keep the tunnel open?

You are correct, I want the VPs’s IP to be what people see, not my home IP.

You mean nginx the regular web server, not nginx proxy manager, correct?

I’m fairly confident espeak is all you’re going to get that’s FOSS, local, and with any non English support. Yes every espeak language sounds like a Brittish guy badly pronouncing that language, and this includes the American English voice as well.

None of this may be relevant, but I’m curious what your use case is. I use TTS very extensively to consume media and have my preferences. None of them are open source, but as far as I know all operate locally, though they’re baked into other programs like screen readers and ebook readers.

I prefer older more robotic voices because they remain intelligible at high speed. Eloquence is a favorite, as are the older Apple voices like Fred and Ralph. I think it has gone by other names but TruVoice (spacing and capitalization may vary) is also up there. It was semi popular during the surreal meme era. Another memetic synth that’s a little before my time but I quite enjoy is DECTalk (AKA the Moonbase Alpha voice). I believe Vocalizer was responsible for the OG Siri voice Samantha and that one’s a more human voice that’s still serviceable at high speeds.

How much traffic before the sales team comes knocking?

In my experience even a site with low legitimate traffic will eventually buckle under the torrent of bots and scrapers if it’s up long enough to get indexed by search engines, so the longer my stuff is out there the more I anticipate I will need DDoS protection.

Building the satellite is affordable. You can do it for the cost of a high end gaming PC. Launching that satellite is where it gets expensive.

The only free wide-area location tracking system I know of is APRS, which is absolutely not private and requires a ham license and equipment.