From what you are discribing I would say a brush cutter,(bush hog).Medium duty 4ft. will serv you well.You can go 5ft. but there would most likely be a wieght problem wanting to lift the front wheels off the ground and having to add counter wieghts to the front.You can still cut grass with it but it won't give you quite as nice as a finish as a grooming mower.I use a 5ft.GM. just because I cut ALOT of grass with it all open fields.There is no problems with power or the weight since it rides on 4 caster wheels.It weighs 600 pounds so its not hard to peg the pucker meter when lifted.I loaded the front with lead so I don't have to worry to much if I forget I'm in high gear.