"There would be a safe place in the Athenaum, we even have the workplace for it, but unfortunately, with Crystal gone the place is not up to standards; the upkeep was his job." Corn said with a sigh. "I could enchant it at home but I would like you to be present, after all, it will be your item. But I vastly prefer to keep my Sleeper life from my Mage life. It is not safe for the Sleepers in my life, but it is safer. Furthermore, the neighbors may notice a woman nobody knows coming to my home for hours when my wife is away for a job. Not to mention that friends and relatives may stop by. Rumors start that way.
But if here is an option, then yes, I would prefer to do it here so that you and the toy may be acclimated. If you have some skill in matter, I would like you to watch with matter sight and supernal vision to see what I do and how magic interacts with the toys. If you are a disciple of matter, then I would like you to actively participate in the casting. The ritual will take a few hours, so it would help to have snacks and all. I will bring the sacraments I require for the ritual myself, but if you are to participate, which I hope you would, you should have something that symbolizes your connection with the matter arcanum yourself."
Are you good to close and start a new one, with a couple of toys (plural) of your choice? To cast the ritual? Remember the first is a test run, not permanent.