I was actually wrong about the mango tree. It's a lime tree he wants to get rid of and I sanction that. It's been fighting to grow forever and it hasn't. I already have a lime tree that does well every time. The last set of limes are there now, but that bears fruit very, very well. The trees he has planted just outside of the fenced garden and truthfully, I think it's starting to encroach on my dog's space or mine. I've never thought of growing something like avocado in a container. Since we are on leaves, do you suppose the lime leaves are good for something as well? Perhaps.
Yes, lime leaves are good for something. Kaffir lime leaves are very popular in cooking, though I am not sure about other varieties of limes. We have a kaffir lime tree at work that I have been contemplating. The tree is small enough that it wouldn't take up much space for now and I could keep it in a pot until I decide what to do with it.
Here are a few links that explain about using them:
http://www.epicurious.com/archive/blogs/editor/2011/03/kaffir-lime-leaves.html
http://www.thaitable.com/thai/ingredient/kaffir-lime-leaves
http://www.bbc.co.uk/food/lime_leaves