How come you run two rigs? Distance/comfort of travel or cost perhaps?
I don't really know why I've got one when it comes to work. I have work I can use it for, but I sure don't need it! My thinking was that I wanted one, so I bought one. If I can make it pay for itself, or even nearly cover it's cost of upkeep, I'll be happy with that.
So far all it has done is cost me money! But then that's what these things do and I knew it probably would before I bought it.