Does anyone know when horses rented to guildies will be returned? Or how long the rental is supposed to last?

Dunno, but I would rather horse "rental" be a searchable thing.  Like I should be able to just list a pegasus for rent for whatever amount I want to list the rental for.  The rentals should also be set to auto end at the weekly patch day, prorated based on the day rented.  If I list a rental fee of 70m for a Unicorn per week, and someone rents it on Wednesday they have to pay the full 70m at that time, however if they rent it on Sunday it's only 30m.  They then can choose to rerent by having the neccessary funds for another full weeks rental in whereever the horse would be rented from, I suggest regions capitol city storage, but the CM could also be an option.  The person renting the horse could at any time in the week cancel the rental with the exception of the last 24 hours before the contract would expire, to allow the person renting the horse to have time to look for another horse.