accessible website for people with intellectual disabilities.

I am writing for some help/advice. 
 
I work as an Occupational Therapist with adults with Intellectual  
(learning) disabilities in the UK.  For the past few years myself and a  colleague 
who is a speech and language therapist have been trying to find new  ways of 
making information accessible for the people with whom we work.   The main 
problem many of them have is poor or no literacy skills.  We have  been using 
a literacy computer program (Clicker 5) to write individualised  
information packages - using images and speech to support text, which we called  CADI. 
 We have written about this for peer reviewed journals and do have a  blog 
_(https://ucaninformdotcomdotcom.wordpress.com/author/waightoldreive/_ 
(https://ucaninformdotcomdotcom.wordpress.com/author/waightoldreive/) )  with 
more information. 
 
However the computers are limited as the program is on one  computer which 
we then have to lend to the person.  The ideal would be to  set up a web 
site and look at ways of making information accessible using  that.  However we 
are both therapists with little to knowledge of coding or  writing 
programs/websites.  We also both work for the NHS in England and  have no money to 
fund anything.
 
Is anyone aware of people who might be able to help us devise and design a  
truly accessible web site for this population ideally on a pro bono basis?  
 Or if there are agencies/trusts/charities that might fund this kind of  
work?
 
thanks
 
Mary Waight