The reason for this is that the rent they would pay will fluctuate with the market. If a city grows and an area becomes more expensive, the landlord captures the uplift by raising the rent and WeWork would operate on a thin margin. On the other hand, if they buy the property, then (if its with leverage) the mortage should be relatively stable as surrounding rents rise making it cheaper. After the mortgage is paid off there is no rent to pay at all and 100% of the location value is captured as profit. Also, the value of the property goes on the balance sheet, giving you back most of the cash paid on the mortgage (or the upfront cash price), so little loss.