The LAA are based at Turweston where I am and the guys there (LAA) are very keen that somepne should offer a kit so i rhink you'd have every assistance (ill happily do likewise).I have been interested in LAA way of offering a kit of AR-1 in the UK. Looking into it and trying to see who could do it there. Should cut off 20k pounds off the price
If you could offer a 2 seater open tandem with 912 power, basic instruments for £50k (especially with GBPUSD at 1.26) it would sell.
I think however the challenges (not technical just the process, time, energy and by default cost) of BCAR-T are considerable. By way of comparison the most recent aircraft to be granted approval is the Magni M22, that took 3 years via the CAA.
Suffice to say its a joke but as I said the LAA are motivated to get a kit gyroplane approved and they have reasonable influence with the CAA.