Seller Financing 16 unit apartment

[Doug Strehlow]

I am looking at purchasing a 16 unit apartment by seller financing that I have initiated. General term would be o% financing for 3 years through seller then take out mortgage on property to pay off seller. Incentive for the seller is that I am giving him asking price without a realtor fee as it is not currently listed. One of the main concerns the seller has is how to guarantee that I will maintain the property. I have several other multi-families that I own and maintain to a high level. Does anyone have a way i can calm his fears of me running the place into the ground? 

 I have the cash to mortgage property, but would like to use it in other opportunities. Any info would be appreciated. Thank you