SD R,
You pretty much covered it all. An offer written like Stan said would most likely be viewed as an offer that has less than a 10% chance of going together and staying together. All his nonsense about the offers being unilaterally acceptable is completely unecessary as well. the buyer can cancel anytime during the contingency period w/o a reason whether they are in escrow on one property of 10 properties. My advice is to find the the property you are most interested in and to negotiate firmly to what you are willing to do. If you cant get there, you walk to your next best alternative.