RE: Moldboard vs. Middle Buster?
i'm pretty sure you can get an ancient 2 bottom plow for less than $100 at an auction or farm estate sale. i'm also pretty sure that it will take you several months and many hours of your time and many gallons of gasoline.
you probably want to start doing the food plots in the next few months. so that means no plow.
take the above advice and just disk the heck out of it. tighten up your toplink so that the front set of disks dig deep and break up the root system. it will take several passes. bone dry ground can be difficult, and so can moister soils.
it might be a good idea to give the grassy areas a pass or two with the disk, then come back a few days later and hit it again.