Please help us try to bring our baby home

Our baby Opie was in an accident on Wednesday 2nd April and has sustained extensive bruising to his lungs. He's been in an Oxygen tent since and is yet to make a recovery. The Vets aren't sure why he isn't recovering and think there may be an underlying cause that we haven't found yet and may not be able to find without further investigations in the form of more X-rays, more CT scans and taking samples from his lungs. All of which are very expensive. We've already spent everything we had saved for a house deposit keeping him in hospital for the last week and we're at the point now where we're running out of options. He goes up and down in both mood and respiratory effort but the bruising doesn't seem to be going down. He is only 3 and otherwise a very healthy and happy cat, It may be that he just needs more time to heal but that also comes with a huge additional cost of almost £1000 a day .

Please, please, please help us do everything we can to bring our baby boy back home to his brothers. He is the sweetest soul and doesn't deserve to be in this position.