I'm still not clear when the cash flows occur I'm afraid - would you mind preparing a small table (you can do it in an excel sheet, apply a border and then simly copy and paste into your reply) showing tenor (ie year) in the left column and cash flow in the right column. Please start at year zero and increment by 1 year every row. It will help me or anyone else immensely in determing a solution.
You will need to provide your discount rate as well (otherwise you can't value the cash flows). You may know this as your cost of capital, your funding cost, your risk free rate, interest rate or some other designation.