Re: What to pay for yard rent?
I agree. Sixty lbs per yard is high, unless it is a really good location. I think your two gallons was about right if not generous. I don't pay per colony, but per yard.
What is your negotiating position? You don't have to keep bees there, do you? And she invited you to keep bees there for a fee. She must not have expresed what she was hoping for before hand. Figure out what you think is reasonable and negotiate from there.
Does she garden? She is already getting benefit from your bees being there.
"It's not what you look at that matters, it's what you see." Henry David Thoreau, Mark B