Normally I'd say anyone with no income putting serious money into something like this was perhaps a bit crazy, but given the response you've already had from pretty major brands and the fact you're already experienced with youtube etc I reckon you've got a good chance of making this work, and maybe even using it as a springboard for future trips / projects. I'll certainly be watching and I imagine a lot of other people will be too.
I mean, it is a bit crazy really. Most would go so far as to say it's stupid in fact. But I think you need a bit of crazy to do something that you'll remember and worst case scenario would be having to sell the car in france and I'd have pretty much most my money back (aside from probably travel costs) but with a ton of memories... so really? What's the risk? Why not! It's not often you have the time to do these things, so I figure it's my time to do the things I would love to and see who is up for sharing in that journey.