@Ben205
We all know that guests dont like to read a lot of writing ..so I have tried to put all of my key information available with the photos that I show.... so ...everything can "more or less" be found through the listing photo slideshow ..the text available to add to each photo is somewhat limited ...more so than with Trip Advisor , but anyway)
"but it's the ones that don't book because they are concerned that I'm trying to reach"
maybe you could add some photo and some text that makes it clear that there is easy parking available ... (I havent looked as to whether you have already done that)
Certainly one extra booking seems a reasonable cost to invest .....blimey a 5 minute walk a problem to some....wow..one hopes not..if so... they might as well stay at home !!!
The free parking as a "Home Highlight" would be useful..for sure
Maybe you could suggest that to be a " key Home Highlight Point" on the feedback link
https://www.airbnb.com/help/feedback