Some landlords offer a discount for early payment as an incentive, but I'm not sure that would be appropriate in this case.

Yes but depending on the loan type they may want to understand what that payment is.

The current monthly payments from all units will remain constant for 35 years, but obviously the value of those payments will be worth far less 35 years from now due to inflation.

Hi MichaelFor a seller-financed deal, especially for a multifamily property like a six-unit or larger, a typical down payment could range from 10% to 20%, depending on the terms you negotiate with the seller.

Took my reserves for down payments to a level that won't allow for another purchase at this time.Given this, as luck would have it, an amazing opportunity that only comes once in a great while came to me.  

So same thing I paid my monthly payment to my bank and kept the rest.

• Payment Structure: • What is your payment schedule?

If you have a mortgage, you will have a monthly payment. 

Quote from @Jaren Taylor: Quote from @Chris Mason: If you have the ability to market and raise money, then you secure the down payment, and do the normal commercial mortgage process. 

If by selling this great deal you are just paying down your principal of the home then it wouldn't make any sense because your payments would stay the same.