I think her parents help her out with her mortgage, but she isn't really interesting enough for a full time yt career. Does she think she's gonna be raking it in like pewdiepie or bailey sarian? She gets the same amount of views as other mundane channels who aren't really that serious about youtube. But who knows, maybe this is the step she needs to take to really focus on it.
I agrew with the above poster who said she really needs to up her game food wise, all those traditoonal fast food places get boring as heck. She'll probably need to eat like magic mikey or VNM asmr to keep her channel blowing up and her content enjoyable.
Those two youtubers live in the US though so they have plenty of options when it comes to dining out; I'm sure London isn't too alluring when it comes to food options let alone the small town where she's from.
This is the exact reason why I'd never consider starting a channel or quitting my job for one; its great if you live in a very foodie area, but I know eventually things would for sure dry up. I do think she needs to quit the vlogs and stupid chatty videos with her bf and have a proper set up and more effort if she wants to do some serious food videos.