There are many different aspects to a Farm and Ranch loan. There are loans that meet the financing needs of both full and part-time farmers and ranchers. Long-term mortgage loans are available for land purchases and refinances. There are banks that finance farm and ranch improvement projects like irrigation and land clearing and leveling. They can also provide financing for both new and used machinery and equipment purchases, livestock purchases, barn construction, poultry facilities, and on-site grain storage facilities.
In terms of the amount of money you need down is not as black and white as you think. Your best bet would be to contact a financial institution that specializes in these types of loans. Here are a few to start with....
Janus Mortgage @ 888-249-0777 (Littleton, CO)
Montana Financial Department of Agriculture
PO Box 200201
Helena, Montana 59620-0201