The new landlord bought subject to your lease (and the upstairs neighbor's lease). Neither of you can break it unilaterally. As I understand it, there is nothing in the lease about the lawncare issue? I have no idea what the default presumption is under Illinois law in the case the lease is silent but the fact that the previous landlord took care of lawncare certainly works in your favor. If the new landlord won't arrange for lawncare and you'd rather move again in September than deal with it yourself, I'd be sure there is no automatic renewal provision if neither of you gives notice.