Big_Paul, welcome to the forum!
please don't take offence if some of us are very direct and seemingly unhelpful, that's not really our intentions!
The truth is we get a lot of D.I.Y'ers on here trying to take short cuts for one reason or another (usually to try and save money).
It is obvious that you are knowledgeable, experienced and qualified in electrical systems albeit not the domestic sector. But this knowledge will certainly help you towards achieving the required qualifications and experience to work in the domestic sector.
Its great that you seek advice regarding this install (rather than just blundering on) and from what you have suggested thus far seems reasonable to me. But it would be fool hardy to not involve an experienced electrician throughout the job. Yes it will cost you some money but this money will be an investment towards your learning experience.
My advice, along with what has already been suggested, is that you employ an experienced electrician who will work with you, can oversee the design and install and is happy to sign off the works.