As I recall he was pretty bad off and got much better over time although some people if they're sedentary they can do a lot. I can do quite a bit if I don't too much "exercise" and pace myself. Other people just get completely whacked by mental exertion.
I publicly asked questions about the prospect of receiving government grants to prop up our organization and we were bombarded with criticism. A few said it was like I was selling my soul to the devil.
At each stage, the learning curve is still just as steep. And the trauma and workload is always threatening to overtake me.