I definitely think if YouTube changed their policy and no kids were allowed on vlogs then Fizz Fam would be more screwed than Inghams, the Bargain hunting obsession is probably part of her growing up without much money and they have a lot of crap in their garage they could sell for funds.
Chris would have to get a job before the money stash runs out but food would probably be their biggest outlet of money as Sarah can’t cook.
On the other hand with Fizz Fam I’ve had the impression that as their income from YouTube has increased then so has their spending, i would be surprised if they have much in the bank and if the YouTube gravy train suddenly ground to a halt they would need somewhere to live very quickly.