Florence is stunning and we highly recommend at minimum a day here. Add a night if you can swing it. Train ride is very nice and affordable.
This will entail a bit of travel, but it is worth every minute. Best option is train from Florence to Salerno and then take a private transfer to your accommodations. If multiple groups commit to this destination, it may be worth booking a group private shuttle which is something I can look into. 💡Pro tip: again- LOTS OF WALKING, pack accordingly.