What's she's doing obviously isn't much different than what dirtbag climbers or ski bums have done for a few generations before. Live cheap, possibly in a car. Get seasonal jobs to fund your very low level of spend. Do shit that you enjoy with the rest of your free time.
She's lucky or recognizes opportunity. Cute girls get a *LOT* more hits and subscriptions on youtube and insta than dirtbags living in vans do, with exceptions like Alex Honnold for instance.
Props to her, I hope she parlays this into a marketing gig, book deal, sponsorships, etc.. The biggest upside to a life like this is learning those critical 'figure it out on your own' skills in a way a lot of people on traditional tracks don't. The biggest downside is getting stuck like this and entering middle age or later.