I love trees but this discussion is about a Mango tree! If the cost of removal is < $500 it must not be very big YET. I have lived in the tropics and Mango trees can be huge. The trunk may not get as thick, but think of the canopy of a large Morton Bay Fig tree! Not only do the mango fruit drop to the ground (the tree is too high to climb and collect it), but the trees also “drop” a sticky sap/goo that stains anything that happens to be underneath. I can imagine the roots would do a lot of damage as well. I suggest get rid of it quickly, and plant something else that will provide shade and not seek out sewer lines for moisture. Just get a tree that does not cause allergies like the Plane trees in Sydney streets.