i own a king kutter 84 inch finish mower, its about 15 years old. use it to mow around 4 acres every two weeks in the summer months. it does a good job, but they are only good for grass only, no rough cut stuff for them and must keep mowed too, can't let it go til it gets to tall, mower will just clog and slips the belts. i use it with a ford 3600 40 horsepower, it will pull it very well. i mow around the fense lines, buildings, and trees with the riding mower first to cut down on the backing up and having to get to close to things with the tractor, then its just mow the lot every two weeks unless we get a lot of rain then its every week. and need to keep RPMs up too.