I hope you didn't buy that Deere. I'm no Deere expert but the owner describes it as a LAWN TRACTOR and you don't want a lawn tractor. If you want to plow, you need a true GARDEN TRACTOR. If you are on a budget, then I'd choose a WheelHorse that has a gear type transmission and multi-speed trans-axle. Hydro's are great for many tasks but if it fails on you, it can be big bucks to repair or replace no matter how tough they were when first sold. Everything wears out eventually, including hydro's so be careful when choosing a tractor.
When plowing virgin soil, you are often asking everything from a tractor that it can possibly give and if there are any weak areas in the drivetrain, plowing will often show you where they are with a loud bang.
This tractor has a manual transmission with a variator drive between the motor and tranny.