I'd love to see what I can do to point you in the right direction. :)
I had a look and unfortunately wasn't able to find any recommended self-catering accommodation directly in Ballyconeely, Claddaghduff, Omey or Errisburg. There are however two options for Clifden, which you can find here
. All of the self-catering accommodation in County Galway can be found here
, and there is a handy map function
as well which helps you see where the accommodation is located.
Another option might be the Renvyle Thatched Cottages
in Tullycross. They are located only 10 minutes from the beach. :)
I hope this was helpful, and I'm here if there's anything you need!