Need to get to son who will be gone forever within 6 months

We have been offered accommodation in Australia so we only need 2500 to get plane tickets for us to be by our boy in his last bit of life he has left we are very worried we won't raise the funds n may not see him alive again can anyone pls help or tell me how to get this fundraising happening I've been posting around alot of fb pages buti have had no luck someone tried to scam me saying they donate 1000 but in end they say I had to pay to release the funds that's when I know I was being scammed so I'm very worried how n who to trust n have faith in