Corinna Schumacher is using the family's 500-million-pound fortune to build a suite equipped with high-tech medical facilities at their mansion, The Sun reported as Schumacher completes three months in hospital today.
Corinna has been at the 45-year-old's side throughout his stay but wants to take him home despite experts saying that he is unlikely to ever wake up.
The German ace has been in an artificially induced coma since December 29 after suffering serious brain injuries while skiing in the French Alps.
A friend of the family for 25 years said: "Miracles happen, of course, and as a wealthy man he has the best care money can buy.
But all the money in the world cannot fix what has happened to him. The family are making arrangements for a future of permanent immobility."
Earlier this week, Gary Hartstein, the former chief doctor of Formula One, warned fans to prepare for "really bad news."
Harstein wrote on his blog: "As time goes on it becomes less and less likely that Michael will emerge to any significant extent.
And whereas I worried more than a bit about what was going to happen when and if really bad news got announced, I've realised that perhaps the lack of status updates has given us all a chance to move on a bit, to process what's happening, and to start to detach."