i wouldn't be able to attend due to finances/distance, etc., but the only issue i really have with the schedule is the sunday afternoon schedule - it's a good idea to have class time followed by break, so i'd do a break before the tea. or just have a break in early afternoon followed by a social event to end the weekend. i'd also recommend short-ish breaks (at least) between the lessons 7-8 and dancing 8-10 earlier in the weekend.
re: accessibility - for me at least - the most accessible dance spaces have had chairs around the room in case i needed to take a break, people who use mobility aids were able to participate, and there was no shame about needing to take a break. that can sometimes be difficult to coordinate in classes where folks are partnered but it's not impossible - lots of folks do it.
http://www.danceability.com/ has a lot of resources for folks trying to coordinate accessible dance spaces. i'd recommend talking with teachers who have experience coordinating mixed-ability dance spaces for the styles you're wanting to teach.