I want to create a product (property) which normally customer made a multiple down payment before actually moving into buying process (mortgage). 

For instance, for $1.000.000 house, I want to made a 20% down payment that can be paid 12 times (monthly) in a year. I also want to include this into 'follow up' features in odoo so the admin can track the deadline of down payment installments.

Is there any way to made this possible without posting the entire product to invoice? Because we can't claim the income of the house before the down payment is finished (no account receivable for the house before the down payment is completed).