If you have Whole life, this will work. I don't believe in Whole ife insureance, because it is not (life insurance, that is). It is a savings account that pays a shamefully low interest rate, combined with a term life insurance policy. I recommend Term life if you wnat life insurance, and savings accounts or money market accounts if you want interest on your cash balances.
That being said, if you DO have a whole life policy, you can borrow against it, and as you repay it, the interest is actually going to you (eventually, after they have the use of it in MUCH higher yielding investment strategies than they are paying you/w3tcompact/icons/blush.gif).
Another similar source of money (and a much better investment to make) is your company 401(k) plan. You can borrow against your balance, typically up to half, and typically for no more than 5 years, and pay yourself back at a predetermined interest rate. The interest is just going into your retirement account. There are some complications with this when you reture, but you get to keep all of the money. You also get to decide how you will invest it (within the choices provided to you by your 401(k)). That may be a good route to go if you want to buy used or an "off brand" of tractor. Before you are certain that you can't afford a green/orange/blue tractor, make sure you calculate the exact payments for each tractor against the (probably) higher rates you will have to pay for a less expensive or used model. You may actually be better off with a leading brand, considering resale and favorable factory financing options.