If you hired a lawyer to defend you then found out that they were also being paid by your opponent what would you think? Letting fees can be considered in a similar way

When renting property is your main source of income having your property empty for any length of time can be a problem. Profit margins can be reduced considerably when good tenants cannot be found reasonably quickly although a certain amount of down time is inevitable even when long term tenants are renting, they will eventually move on.