It's going to cost him a ton of money to stump it and get it clean enough to row crop it.
I currently sell machines for this very application and per acre it's anywhere from $1500 to $2100 depending on the removal of any huge hardwoods, are stumpseverywhere or are they rowed, and getting the site cleared well enough not to do damage to the farmers planting and harvesting equipment, much less whomever it is, the farmer or landowner, that has to get the soil right so it will be able to grow peanuts, etc. He can go the less expensive " bulldozer and windrow and burn route" but that may take a very long time. Time is money.