Seeking Advice

Hi,  A family member had prostate cancer 4 years ago and now its returned as incurable bone cancer he is 56  He's had 3 radium injections so far and has been in agonising pain in 1 leg, cant walk and so has lost all his muscle mass.  Is this pain normal? He's a legal guardian of his niece and so is worried that if he reaches out for help with social services or the hospice they may take her away.  Family is doing what they can for him but he lives in the Isle of Man which makes it hard logistically for family to get over there with their jobs.  Parents are elderly buttering hard to help daily. He himself is only 56 and struggling with the diagnosis  we dont know his life expectancy as he wont ask. Does any know what help we could get for him and if it will impact on him being a guardian or who to ask.  She is his life so any threat of losing her is unimaginable.  I feel like we are wading through mud and i would love to know who I can talk to, to get the correct information to try help him and family. Thanks for reading.