For multifamily housing the price of a building is usually such that if you put around 40% of the purchase price down the building is cash flow break even after mortgage, taxes, expenses. The same is basically true if you buy a house to rent out. This is the case because over long periods of time real estate has appreciated by 8% per year with much less volatility compared to the stock market, and favorable tax rules (particularly depreciation) mean you can "lose" a lot of money on paper and claim those losses to offset other income. Your landlord is not giving you a great deal.