I've raised £200 to to help my brother Ben, in his rehabilitation, to try and walk again

On August the 19th im planning on doing a tough mudder course. This is completley out of my comfort zone but i want to do something that will challenge me and hopefully raise a bit of money to help support my brother Ben in his rehabilitation..
2 years ago my brother collapsed on a train going into work and got taken to hospital with what was believed to be a Neurological Spinal Condition. 5 days later he was paralysed from the waist down, 5 weeks after that from the neck down. He spent 7 months in an acute ward only able to move his head then 3 months in rehab where he has now regained the use of his arms/hands and upper body. To this day the consultants have no idea what has happened to him and he remains un-diagnosed.
As his bodies motor and sensory nerves have slowly started to recover he has had to retrain his brain and body to do the simplest of things, things that most people would take for granted like writing, dressing or even feeding yourself. He has also had to deal with extreme depression, but he has battled on and continue to smash through all the barriers put in front of him.
However, even though Bens amazing strength keeps shinning through, he still faces ongoing battles and fights to get appropriate treatment and resources.
I want to try and raise a little bit of money just to help Ben with the financial burden that unfortunatly comes, with having a disability like this