A partnership controlled by Atlanta, Ga.-based real estate development firm Cousins Properties has submitted a $33 million cash offer to buy the 1,352 acre Heep Ranch property on I-35 between Austin and Buda, which is one of the most desirable commercial properties available in the fast growing Central Texas area. The offer is subject to Bankruptcy Court approval in the pending chapter 11 case of Hatsy Heep and husband David Shaffer.