1; Gonna be laying sod for the first time in 2 weeks and i was wondering which size to rent? 6 hp/$55.00 a day 16hp/$99.00 a day Im doing a back yard. It has no grass or weeds, just dirt. 1000sq ft. 2;Also, do I rototill the ground before puting in the top soil and then rototill it together? or do i add the top soil on top of the dirt and then rototill everything together? Thanks a lot. Im new on this business and so far, this site has been very helpfull.