i have this friend who just recently had a house built. she is now in need of a lawn but she has the crummiest soil i've ever seen. its this god awful clay. i've already figured up her lot to be around 8-9k square feet. what should she do to fix this to grow grass? i was thinking about a 2 inch layer of topsoil rolled then slit seeded. what are some other ideas you all can come up with that might save her some money? thanks. randy.