The shop will still be open, Sophie and a few of the boys work there. The last time Tillie was in hospital they took it in turns to stay with her so that one of them was at home IIRC. I really don't think they are relying on YT as a full time income, they get more in tax credits per month. I think although the YT money must come in handy it is their way of staying in the media/public without having to do TV programmes where they don't have content control. That way brands still want to gift and sponsor them holidays, which is probably what they really want. Much better to get a #gifted stay in Disney/Duinrell/wherever than to receive a cash payment and have to pay tax on it.
Wishing Tillie a speedy recovery.