A family in a street where I used to live were demanding to be rehoused , house was 3 bedroom, the couple had 6 children and one on the way, as well as various pets. The front garden was full of a broken down van, mattress, tyres etc and one night these were set on fire. The house wasn't badly damaged as the fire brigade arrived quickly but the family wanted to move. The SS told them it was only smoke damage and it was habitable. There had already been several complaints by neighbours about their behaviour and state of the house etc, so the private landlord evicted them. The council had to rehouse them. No one could prove who started the fire but the local community beat officer told one of the neighbours that they were convinced the father had one it on purpose to be rehoused.
I am not saying that is what has happened here and they may be innocent, but it was an awful risk to take which went horribly wrong, if it was either of them.