A monte carlo project - open to bidding

Hello, Me and a friend of mine are doing an investment [login to view URL] see in the attached file what we want to have in a openoffice calc document. We understand the mathematics but we are very bad with openoffice calc. It shall be easy in the final product to insert inputs such as rents, costs and so on. Do you think you have the knowledge to do this project? How long do you think it would take and how much do you want for it? We are flexible with the budget.