The board may participate in loans made to finance agricultural resource projects by purchasing from a lender up to 75 percent of the amount of each eligible loan. If the loan participated in is for $500,000 or less, the loan may be for 100 percent of the cost of the project. If the loan participated in exceeds $500,000, the loan may not exceed 80 percent of the cost of the project. The lender shall service the loan or cause it to be serviced in a manner that equally protects the lender’s and the board’s interests.