Welcome, to you. I am only 44 years old and have bad back and legs ( to many years working in coal mines
) I do understand about the limits our body's put on us. I have 4 fused vert in back ( do not bend that well any more, and my right knee needes to be replaced, left doc say's 1 more surgury and it will be shot too!
But I still want to do the crusing part for the family
and myself. I have had 4 boats before the 250 mainly ski and tube boats. I could not but the wife loved it. All I can say is try and you will not be let down. " We never know our limitations until we try".
Best wishes to you and yours.