You seem like you are ignoring multiple respected builders advising you to go for a smaller project than hornhill with points such as "i really want to do this" or "yes mountain terra is hard but there are flat areas too(doesnt that make it even tougher ?)"
Moreover , the way you look at the immersion seems like you just wanna do it for the sake of doing so and not actually having interest on it. Because many people told you that you're not ready for such a large project and you dont have the sufficent experience to take on something of that scale you say "ok people told me i didnt have any previous projets so im gonna have one and take this) for your eyes are cleary on large & Wealthy projects. Thats an incredibly unhealthy way of thinking.
I understand that you like doing Fancy and Highclass projects and you are greatly enthusiastic about it , however , ignoring people's advices and being enthusiastic is not going to get you the project. You have to understand that people doesnt have a grudge against you. this is a community project and although personal projects are well , personal , it doesnt change the fact that this is a community work and its the communities job to ensure its quality.
To sum it up , i think you should save your plans about horn hill for later and go for a smaller , less terra-demanding project that is suited for a first project
the project is not running anywhere. You can apply for it whenever you want