When budgeting, consider purchasing crop insurance. They offer multiple policy types, such as hail only, multi peril (hail, wind, disease and drought) and one that includes price drops (you buy the policy for corn at $8.10, but at harvest you only get $6.10 - the policy pays off yield times $2 / bushel).
You also might check into the CRP program.
http://www.fsa.usda.gov/FSA/webapp?area=home&subject=copr&topic=crp
There is a long list of qualifiers to be able to enroll, but basically it takes erodible crop land out of production for a 10-15 year period. They (gov) pays half of the cost to establish ground cover, then pays you a yearly per acre fee of (variable depends on numerous factors) $65 to $100? Per acre.
BUT- during drought years, they allow you to hay the ground, and you can lease the ground for hunting, etc.
My thought process here is - if (big IF) you could get some ground enrolled based on previous farming of the ground - your tenant or father, it would be some cheap fixed income.
Are these applicable to you?? I don't know. But I do know that the successful farmers take FULL advantage of EVERY government program there is to make the operation work.
I am not a farmer, (but I did stay in a Holiday Express last night - ok bad joke

but worked on farms as a teen, and back when my FIL used to row crop several hundred acres I would help him when I could.
Another thought, you might check into college classes in your area. Never hurts to learn the science of growing.
Dean