We are planning a family holiday to the Turks and Caicos islands having not been away for three years.
Both dh and I are teachers so earn an Ok salary but are stuck to school holidays. We have two adult dc.
Our son is a doctor, 26, and has paid for his own flight and is happy to pay his own food and accommodation.
Our other son is 23 and is doing a masters at university. He’s paid for his own flight using a voucher he had from a cancelled trip. But he’s asked if we can cover his food and hotel. He’ll share a room with his brother.
I think that’s fair, and actually thing dh and I should pay him back for his flight. He isn’t working so shouldn’t be expected to pay for a family holiday. His own holidays with mates have been to 2* dumps in magaluf 
Our youngest is our ‘travel agent’ and is great at sorting hotel deals, flights, restaurant bookings etc. He’s taken over from me.
Dh thinks that he should pay his own way as he’s 23, but I think that we should pay. Aibu?