not as smart as if mother had got him ready
He's 15 not 5 !
The eighteen yr old is an adult, if he was going to uni in September then he would be fending for himself., and bringing his piles of washing home to mum in the holidays I don't think I would leave a 15 yo alone but it would depend on the boy. He wasn't alone though he had his elder brother and you 20mins away.
I have left mine together at those ages. My mum was near by.
Static caravan purchase is it worth buying