Selling a portion of my 3 acres

I have a bank loan and own 3 acres which is my principal residence and a couple of out buildings.

I wish to sell using owner financing (I'm thinking Wrap around mortgage)  half of my property to a family member.  Question:   Do I need to subdivide and get a new property line showing that there are 2 -  1.5 acre lots in order to sell?   Or can I sell using seller finance to my family member without subdividing?