Mr Tooth has been using a wheelchair for the last four years after a rock climbing accident triggered an autoimmune disease which affects his joints.
He said: "I'm so much more able in my wheelchair, but for a long time I tried to hide the problems I was having."
He said after becoming a wheelchair his career "just ended, it was literally like overnight".
"I was earning a 20th of what I'd been earning before, I couldn't get work, I couldn't get meetings," he added.
"It was an overnight change, and going to meetings and pitching and networking, it was like I was invisible."