Last Updated on October 14, Buying one rental property may not make you a ton of money right away. However, rentals can be an amazing investment when held for the long-term and when multiple properties are purchased. There is also the opportunity to buy larger commercial or multifamily properties, which can increase returns as. With a good rental property, you should be making money every month cash flow ; you should make renhing as soon as you buy by getting a great deal; you will have fantastic tax advantages, you can use financing which greatly reduces the amount of cash needed; and the property value and rents will most likely go up in value over time. Rental properties have been a great investment for me. I now have 20 rental properties which are a mix of residential and commercial.