Mortgage Assumption/Due on Sale Clause/Lease Options

[Blake Dowe]

I'm looking at a 3 unit turnkey that I am going to try to acquire through low/no money down options. I would like to try to assume the mortgage if the seller agrees and if the bank allows it. How can I find out if the loan has a due on sale clause? I've also been thinking about a lease option. 

I know there are other no/low money down options, I would love to hear everyone's thoughts.