I would think that a man could build one of these, working on weekends, in five years, maybe more.
And it would stand for centuries.
He wouldn’t need a gym membership.
His wife wouldn’t worry about him getting into mischief.
And when finished he could keep an eye out for invading armies.
It doesn’t get any better than that!
Or… he could put the same effort into building a dream home in the country. Now that’s an idea!