please help to get to the lawnmower

Our family lives in country side and we have 5000m2 lawn. We allways used small lawnmower and trimmer, but it is to hard to get short lawn with these devices, also such area is not possible to lawn for kids or wife. As I am only working person in family I can not aford at this moment to buy lawn tractor, but it would be really blessing, if we would have one!
I am really open to send some self made light fixture to some of biggest donators, because I made them in my free time and it is my hobby.