RE: Plow VS Disk
A plow and a disc are actually used for two different reasons...Plows help bury refuse left from last years crop, control insects and they help the land freeze and loosen up when done in the fall...Plus farmers usually disc after they plow to help smooth the land and make a good seed bed...So, even if you buy a plow, you need a disc..
If you are going to have only one, get a disc.