I gotta admit that having a park out your front door with no street in between sounds REALLY COOL not to mention very unique in a good way!
One piece of sage advice. The buyers competing against you may not even be on the list they are calling at the releases. If these lots are as prime as you describe them to be, there is a very good chance they will get scooped up by “friends & family” of the builder/developers. They arent on any list and can just step to the front of the line anytime. I learned this the hard way with a house in La Costa Oaks that I had my eyes on and was 1st on the priority list for.