This means we were able to use less cash to purchase the building. This benefits investors because the return is greater with leverage. Remember however, in the case of income property the tenants will be paying the debt, not us. After the improvements we have made to the property and the increase in rents, this building would sell for 4.6 m. Tell them what you plan is and do it.
Bankers are conservative people, so create a conservative plan and exceed it.
That is a way to strengthen the relationship. You will need the banks in the future to purchase other deals. A More Recent Example is the Barcelona. Build in 1922, beautiful building with a lot of charm. The Barcelona was a complicated purchase located in a great part of the city.