I'm so glad you have such talented backup. I believe you won't need it because I know how determined you can be. You will do this and have something of which you will be very proud and your hens will love!I hope to work on it a little each weekend. I won't push it. Instead it'll be a pleasure project, to be undertaken at a leisurely pace and with love and care, both for myself and for the hens.
Luckily one of the neighbours is a woodworker in his spare time. He mostly turns things on his lathe, but he knows all about woodwork and about chickens, so I'll be relying on him for advice when it's needed. It's the same man who gave me his big car to use yesterday and showed me how to tie the lumber down securely with the ratchet tie. A top bloke.
You got this!