Have mortgage but want to owner finance

[Harri Smith]

Hi fellow investors:

I want guidance here, although, eventually I will need to have an attorney draft the contract.

I have a mortgage left for my property but I need to sell it for various reasons. I have a prospective buyer who want to put down half of the sales price and pay me every month. He can't get a loan for various reasons ( disability, etc) but has income to pay me (mortqage) every month. 
How do I structure the deal? I need to pay the bank but I need to have him pay tax, maintenance etc, and give him tax benefit of an owner.  Do I need to tell my bank as they are the lease holder? With the money I get, can I invest somewhere and pay monthly to the bank as I am doing now? He has to build equity on it, so that option does not sound right to me.

Lead me in the right direction..

Thanks in advance

Harry