@Liv,
Due to the location and construction of the guesthouse, we cannot much customization to access the property. Since I don't want anyone to be disappointed or get hurt, I usually am straight forward with inquiries that contain any language about mobility concerns. If persons must use a wheelchair, cannot negotiate a steep ground incline/decline or take stairs, then our property is not for them.
I thought that I was being proactive when I installed the grab bars in the baths, but a guest said that the tubs were slippery. Since they were a little more senior to me, I took that information as a hint that more safety measures were needed. I put down anti-slip bathtub stickers, but alas they weren't anti-peel stickers, and came up after just a couple of showers. So, we removed and replaced them with bathtub mats (there was a recent thread where I picked up a tip to post a sign about how to properly lay down the mat).
The main accessibility changes that I could do for a guest is to relocate kitchenware from upper cabinet and wall, and place them in a wire rack that's at a lower height (Thanks, Liv. Now, I won't sell these racks.).