Well done for taking the plunge.
Please , please, keep a diary, as I for one, would love to follow your progress and hope to do the same one day.
We've never done a 'new-build', but we have done a 'restoration' and loved every minute of it ( - even the 'disasters' were quickly overshadowed by the 'triumphs'). I do strongly suggest you have a contingency plan in place 'tho', just in case there are hold-ups in the completion!
Very best wishes,
Angie