Reminds me of the old joke...
A priest, a wealthy businessman, and an engineer are playing golf together. After an hour, they’re only on number 3, when the ranger comes by.
A little miffed, they ask what the heck is the delay today?
The Ranger says I’m sorry but we have a group of blind veterans playing as guests of the club today.
The priest says, oh my, no worries I’ll spend my time saying a prayer for them in their struggle.
The wealthy businessman says, oh my, no worries, in fact I’m going to personally ensure that each of them has the finest golf equipment available at my expense.
The engineer says, why the hell can’t they play at night?!
Interesting. I knew nothing of these products till reading this. Apparently there are numerous manufacturers of these robotic range mowers and ball pickers. I did a Google search for cost and the Roomba ones are $15K for the mower and $19K for the ball picker.