Buying properties for free
To purchase any property for free, use one of the following tricks depending on whether it will provide income or not. Note: Using this glitch may permanently prevent you from doing certain side missions that are only activated when you purchase property the normal way. You also must have enough money to purchase the desired property to use this exploit/glitch. Additionally, this glitch only works on the unpatched version of Grand Theft Auto 5.
For properties that do not provide an income, position your vehicle in front of the sign that enables you to purchase it. Get out of the vehicle, buy the property, and then immediately get back into your car.
For properties that do provide an income, go up to the sign that allows you to purchase the property. Press Right on the D-pad to go to the confirm purchase prompt. Press Right on the D-pad again to confirm the purchase, then immediately pause the game. Replay any mission from the replay mission menu (ideally a short mission), and complete the mission. You will then spawn back at the property. You should now own the purchased property, and still have the money you originally spent purchasing the property.
Added by: Xxx THE GAMER xxX Nov 29th 2013, ID#5637