I would not pay to rent a scope.
I might pay to rent a top of the line spotting scope for a family vacation. I would be looking for a Swarovski 20x60x80mm HD, with a camara adaptor and a Swarovski tripod.
If you are thinking about starting up a business? I have a Swarovski 20x60x65mm spotting scope in new condition I will sell you. I want to move up to the 20x60x80mm swarovski spotting scope.