Hi I am looking at the Fastrak 18/44 or the 20/52. I currently live on 3/4 an acre with a lrage amount of landscaping. In two years I will living on 5 acres with large sloping hills. I will probably only mow 2-3 every week and the rest monthly. I need a mower now that can mow a well manicured lawn and not leave tracks or turning marks, but I will need a mower that can cover some acreage in the near future. Am I kidding myself in thinking that a single mower can do all this. F.Y.I. I am 6.1 and 290 lbs. Does this present a problem when using these machines. Thanks for your time.