How do you address seller financing when they are more down

[Jian Yang]

I have a commercial deal I am working on. The seller is giving me low monthly payment and for long terms also. The issue I am having is he wants too much money as down payment. His concern is about getting the property back if I default so he wants a lot of money down (50% down) which kills the deal. I want to make this deal happen more then the seller dose and I dont know how to make him feel more comfortable with less money down.