The average cost for hiring a web designer varies greatly depending on the scope of the work, which may range from building a site from scratch to rebranding an existing one, as well as the amount of content and graphics the designer will create. In general, the more complex the project, the more time the design agency will have to spend. Because web designers often work on an hourly basis, the longer the project, the higher the costs; you can count on the web designer spending at minimum 10 hours to create a very basic website with just a handful of pages with few elements. Prices also depend on the designer’s skill set, the process, and the company’s rates. In general, the national average cost for a basic website package starts at $500, but a customized website can cost as much as $2,000 or more. Here are typical average hourly rates, broken out by the complexity of the work:
The 2014 case involving Peapod, an online grocery retailer emphasizes that being ADA compliant goes beyond your website. The settlement required Peapod to make its mobile applications accessible by March 2015 and its website accessible by September 2015. Since mobile apps are fast becoming the preferred method of online shopping, e-commerce sites must focus on app accessibility too. 
This past September marked the first time a judge ruled that the ADA applies even to businesses without a physical location. Scribd, an e-book subscription service is considered to provide "a place of public accommodation." Their services are not accessible to blind persons because they cannot be read with a screen reader. The judge reasoned, "Now that the Internet plays such a critical role in the personal and professional lives of Americans, excluding disabled persons from access to covered entities that use it as their principal means of reaching the public would defeat the purpose of this important civil rights legislation."
If posted on an accessible website, tax forms need to be available to people with disabilities in an accessible format on the same terms that they are available to other members of the public – 24 hours a day, seven days a week, without cost, inconvenience, or delay. A staffed telephone line that sent copies of tax forms to callers through the mail would not provide equal access to people with disabilities because of the delay involved in mailing the forms.

According to Creating an Accessible Presence for the Lodging Industry by the American Hotel & Lodging Association, “Many businesses don’t understand that the law actually requires them to make their websites accessible to individuals with disabilities. There is a common misperception that the Americans with Disabilities Act and similar state and local laws only deal with physical buildings and facilities, so-called “brick and mortar” establishments, and that non-building-related business operations—such as websites—are not covered by these laws. Nothing could be further from the truth—at least with respect to websites that have some sort of connection, or “nexus,” to physical places of business.”

WCAG guidelines break accessibility issues down into three levels. Level A issues are the most urgent and include problems that can severely limit a disabled visitor’s ability to navigate or use the website. Level AA issues tend to be more rooted in functionality, addressing areas where improvement is needed to give disabled users the full experience of a site. (Level AA is considered the target standard for most commercial websites.) Level AAA issues are the highest standard, fine-tuning and expanding on issues identified as Level A and AA. While it is an excellent goal, full Level AAA compliance is likely beyond the reach of most websites.
Yes, all websites must have hand rails in the rest rooms, ramps in lieu of front porch stairs and elevators with doors wide enough for wheelchairs to be easily loaded into them. Seriously though, ADA only covers Americans, and the Internet is hardly just an American institution. Besides, browsers can already be configured to override the web designer’s pre-configured fonts, font sizes, font and page and page background colors, etc, to make it much easier to read. Also, the big 3 Operating Systems (MS Windows, MAC, and Linux) have text-to-speech programs which will allow the computer to read...

If you do get sued, if you immediately remediate your website, you may be able to get the lawsuit dismissed on mootness (there’s no longer anything in dispute, i.e. plaintiffs are arguing your website is inaccessible but you’ve already made it accessible). This definitely does not mean you should wait to fix your website but it does mean you may have an out.
HTML tags – specific instructions understood by a web browser or screen reader. One type of HTML tag, called an “alt” tag (short for “alternative text”), is used to provide brief text descriptions of images that screen readers can understand and speak. Another type of HTML tag, called a “longdesc” tag (short for “long description”), is used to provide long text descriptions that can be spoken by screen readers.