Single Family Home for sale by owner in Olathe, KS 66062. You know you can afford a house, but you are cash-strapped for the down payment? We are looking to move out of state and currently have an FHA loan that is assumable. How this works is: you must meet FHA income and credit guidelines and must have good debt-to-income ratio (in other words be able to afford this payment). In order to assume the loan, you'll have FHA paperwork to fill out, credit reports and other underwriting done, and pay ... See site for full property details.