The family of missing Fife RAF serviceman Corrie McKeague are understood to be considering hiring private detectives and private data analysts to find him.
Corrie, who was based at RAF Honington near Bury St Edmunds, went missing in the early hours of Saturday, 24 September.
He was last seen on CCTV entering a dead-end, horseshoe alley but was never seen exiting.
His mobile phone signal was traced miles away, mirroring the path and time of a bin lorry.
So police searches and investigations have failed to trace Corrie.
An online fundraising page has so far raised over £25,000.
Corrie’s mum, Nicola Urquhart, from Dunfermline, said: “We have had an emotional week but regardless of how difficult it has been we are so honestly speechless at the amazing generosity of every single soul that has given us their time, their prayers, thoughts and most importantly this week your hard earned money.
“I just don’t know how to thank you all. You have given me and the boys the ability to put in place today the things we think can bring Corrie home.
“You lift our hearts and minds and truly give us the strength to carry on each day.”
Suffolk Police have launched a major investigation over Corrie’s disappearance, and said they were treating the matter with the same level of seriousness as that of a murder inquiry.