I will allow it. Perhaps a special pendant with the runes on it can be used for the travel but it would drain him more if you want it on his body. This kind of spell though would only be available to the older mages, which means your character must be at least forty. Also, I would expect that the spell could be used two to three times a day but it would then be unavailable to your character's use for a week to two weeks. Although, a mage as old as that would also have ways of storing their energy in a object they wear by the use of a rune or two.