we have 3500 sqmt here in zam and i had guys level it with the biggest billdozer i have ever seen lol. really huge .then thay leveled it by hand then laid the grass by hand every 6 to 12 inches apart lumps of carabal (wrong spelling lol) grass . its taken 2 years to be really nice it really is but have to cut it every two weeks bloody grows so fast lol takes 2 days to cut it and get cuttings up (but its still not perfectly level lol so carnt use a lawn mower ) i have started on walls round house and garden 9 ft high in some parts put poison ivy and its growing lovly up walls another 12 months the wall will be covered all takes time and love gaz/maybs