There are some web experiences that I'd describe as like walking on rocks or shards of glass and I'm an ordinary, typical user. Well ok, maybe I'm not. I certainly look for a bit more in my web experience than a normal everyday user does but you know what I mean. So if it is tough for me imagine what it is like for a user with even the slightest impairment.
Up until a few years ago I would have probably created a website that isn't very accessible but appealed to me in every which way. I used to think that was ok. Now that I look back on things the argument could be made that I was in fact alienating users from my sites because I didn't do very simple things to make sure the site was accessible.
It strikes me as odd though, that people I have discussions with always ask me how accessible does something have to be? My usual response is a question back: do we have the means to do everything we can to make it as accessible as possible? If the answer is yes we shouldn't be setting minimum goals but instead a standard that we will achieve with each of our web and mobile properties. We (you, too) should do everything you can to make sure all audiences can access your online properties and have the best experience they possibly can. Sure, someone that is using a screenreader won't have the same experience as someone who can navigate a site without one and even in that scenario there are a lot of different levels but you get what I mean. There is some leeway but it should never be a grey area issue. I want you the user/visitor/potential client to have a great experience on my site and if you don't then it's 100% on me to make sure I correct that for the next time.
Don't kick the can down the road. Make the decisions now to be accessible and start working towards being so. A great place to start is by checking out the WAI. It was the WAI that spun up the WCAG 1.0 and now 2.0 guidelines. This isn't reading for the feint of heart. It gets deep and addresses all sorts of forms of accessibility but is well worth starting to bite off chunks of.
Disclaimer: this site, in fact, has some accessibility issues that I am currently working through. It's turning out to be a bit more difficult due to the Square Space templating but I'm getting there.