As mozz said, DigitalOcean is a good company, but looking for that much storage you would be spending upwards of $100/mo.
And if you are running anything illegal, you will likely have your instance investigated and have your ssh keys and password overwritten by whoever is hosting it.
If you are looking for something that is as private as possible, you would be looking for a bulletproof host, which will cost significantly more.
Assuming you aren’t looking to run anything illegal, I also provide hosting, and you can reach out to me if interested.
The newer cars from the company I worked for were always trying to phone home, not sure about other companies but this one was trying to lock you into the online ecosystem.
SSDs were from Garland computers (great company and visited locally)
All the refurb drives are water panther from Amazon, but they have a website you can buy from directly. They are RMA drives from Western Digital and Seagate with 0 hours.
I’ve bought plenty of used drives, like 25-30 from eBay alone, only had around 5 SSDs fail after pretty heavy abuse. I’ve also bought refurbished drives, they are really good value from buying brand new ones.
Speaking as someone who worked for a corporate auto maker, it won’t be an easy task since they try to make it as difficult as possible to disable online activation if even providing the ability at all.
The only real solution is pulling the head unit and trying to find any modem and desolder it, which who knows if it would function as it had before hand since everything is integrated.