In working up my large apartment complex bids I am looking to get some info on how much more efficient I can do the large properties (6.5 acres and 5.2 acres of turf area). What 72" mowers would you guys recommend? I have heard to definitely go with Diesel because of the longer life and expense. How much production can I put out with a 72"? My research and a friend told me to expect 50% - 80% efficiency which with the 52" was somewhere in the range of 56,000-90,000 depending on situations. Is the 72" going to be a range of 78,000 - 124,000? I think I did my math right I just want to see what you guys think?