J. Closing Date_The Closing Date should be stated as On or Before... the Closing Date to provide flexibility to parties involved. Unless there are stated terms to the contrary or "timeline contingencies", it should also be stated the buyer and seller agree that the buyer has exclusive right to purchase said assets up to and including the Closing Date.
One of the most important things you can build into these documents is a clause that allows you to perform proper "due diligence" on the property. Basically you want to make sure that you have time to review all of the necessary financial information, management documents, and fully inspect the property itself BEFORE you finalize the purchase of the property. If things are not what they appear to be on the surface, it is better to find out now _ before you own the property than 6 months down the road.