Deal setup and confirmation

[Matthew Koch]

One category is offer her my first offer again at 80k the second offer is seller financed up to 80 percent of her purchase price or lastly 3rd option is being able to give her the purchase price that she's asking for minus 1 year of living expenses to move to Oregon if she agrees to finance the whole amount and become the bank and the terms are 5% interest only loan for 30years with a balloon after 2 years to be paid in full. 

Based upon the asking price of $189,000 in Jerome Idaho for a 5 bedroom 3 bath house. 

The goal is to have the homeowner move out and the home would take too much money to recover or renovate it so the goal is to take it down and build new from scratch as the lot would be able to allow for 3 units and each unit to put a duplex on that unit so the end result would be an almost full acre lot allowing the lot to be subdivided into three parcels and each parcel has one duplex on it or 6 doors total. 

Which options of those would be acceptable terms in regards to being in a position to get this house under contract or how else can I get it structured?