Apart from the season of Autumn, where you need to broom out the leaves the tree has no other need to tending to. But the benefits are enormous. I go on the top of my home during the nights and its always cool in all seasons. There is always shade, early in the morning birds chirp and its very pleasant to hear that.
My home looks like an Oasis in the middle of an desert as there no trees around. Kids play under it, People like to stop for quick rest. Even from far things look green and fine.
Its only an excuse that rich people stray around green places. The fact is anybody can plant a tree. It doesn't take money to do it.