Hi
Unfortunately, we are unable to provide specific advice tailored to individual circumstances on this forum.
This forum is for general queries only and is intended to help you self-serve.
Customers with more complex enquiries often engage the services of a professional advisor or accountant and this may be something you wish to consider.
In relation to your AIA query guidance relating to not claiming the full cost can be found at:
Claim capital allowances: Annual investment allowance
Thank you