AARP created a nice guide to ADUs earlier this year with some case study write-ups. They have followed up with some full length stories of the ADUs featured, including a nice interview with Bertha who had a Starlet built in St. Petersburg by Historic Shed.  https://accessorydwellings.org/2019/12/15/berthas-adu-a-tiny-cottage-in-my-sons-backyard/