Are you in the rental business or the real estate market? You can't effectively be in both. Don't give them a price. Pull their credit and see what their FICO score is. If it is 700+, and their income is high and steady, and they have 25% down, they may stand a chance at buying. If the FICO score is low and income low, and they have little down payment, they will not qualify for your house, not now, or in three years. Forget it.