You will find plenty of folks here on the Forums who are willing to offer their advice and guidance on a build, that's the primary reason we exist, to help facilitate people's dreams of building a Halo Universe costume. We have a multitude of tutorials, literally hundreds of Work In Progress and Build documentation threads to read and learn from, in addition to our curated collections of free Pepakura and Foam templates and free 3D printing STLs.
Now, if you mean someone to come out and help you in person, well, the first thing we would need to know is, where are you? The 405th is an International Groups with members and Regiments all around the world. So, we don't know if we can help you in person if we don't know where you are.
The second thing is, well, we don't know you. Not many people will go out to a complete stranger's house, or invite a compete stranger into their home, even among a group like ours dedicated to helping others build their costume. Folks will be more willing to assist, especially in person, once they know you.
Who are you? What Costume do you want to build? What material do you want to make it out of?
Strick around, introduce yourself, establish a connection with the community and you will more than likely find folks who can and will help, but, until they know who you are, they will be understandably hesitant to assist in person.