would it be okay for me to make assumptions that majority of multi unit sellers understand owner financing associating wraps, subject to, lease options(master lease), etc? i would think that most buyers(investors) bought in with a seller carry back.

im currently analyzing a few multi units for cash flow with an 10-12% cap. im looking to throw a couple of low ball offers to see if i can get a bite. this will help tune my negotiating techniques to get the ball rolling and to help grow some thicker skin in this cut throat industry.

It would definately not be ok to assume they understand creative finance techniques as a majority of them do not.
If someone is selling their multi-family property they either want to 1031 to another property or they have no desire to be landlords any longer or are looking to cashout and retire. Either case will make it difficult for creative finance techniques as these sellers want to cash out and not carry any financing.