Design for Disability Access.

FAQ's:

Q. Is it expensive?
A. Yes and No. Compared to designs that do not take accessibility 
into account, it is.
It is, however, less expensive to create a website for accessibility, 
than it is to make an existing inaccessible website accessible.
The added cost can be measured in some extra dollars per page.

Q. What if I just wanted a "text only" equivalent site? Surely that would 
be cheaper than recreating my existing website to be accessible, wouldn't it?
A. Maybe, maybe not. A good many things have to be taken into 
consideration and applied in the design when you design a fully accessible website.

Q. Why bother?
A. The upside to it is that you will have increased visitors to the site. 
And, you will know that you did the right thing. 
In Canada approximately 1 in 10 people live with some form of disability. 
Granted not all disabilities limit the Internet experience. Two bad legs might not, but two bad hands, eyes or ears will.