I think that may be a boxelder. It looks bigger than they normally get here. You can confirm by cutting a couple of limbs. There will be red streaks in the grain. Or if your neighbor remembers from cleaning up the other half. Brittle wood with pretty weak hinge. I'd try not to fell one leaning like that with something valuable in the path.
With no climbing, how about a tow behind lift rental? They go up to 50 feet, that'd likely do the whole tree, but even if it doesn't reach the top, it'll remove a considerable amount of side weight before falling.