Investors & landlords

What if I inherited a property (land, no house) and we decide to sell it via seller financing.  What of the proceeds are taxable and at what rate (is it capital gains tax or income tax)?

 

So for example, would the trustees of the estate be taxed on the down payment, the interest of the monthly payment?  Also, if we had a 5 year term that required the buyer to pay off the remaining balance after 5 years, would we be taxed on that lump sum payment after 5 years?  Thanks!