My daughters cat binx needs your help

Hi there my daughters cat binx is really needing to go to the vet I don’t have enough funds to cover the full cost straight away as I am a mother of 2 and don’t get a lot of income his skin is torn showing his muscle and it is bleeding. my daughter is in tears over this I need to pay and just don’t have enough funds at the moment I am sorry about the graphic images below but this what has happened to him and what he needs to have fixed at the vet