A wish spell could be good, I have one that always works for me...uhmm... to rework it to suit that purpose.
Use a green candle and a nice peice of paper, light the candle, have him write the apartment wish in detail, fold it 4 times, with all the corners pointing to the centre (a larger peice of paper works best). All the time keep focused on the wish at hand, after which I find a few words work best like "My will is my own, Let it to all be known, Like a seed, let my wish be sewn"
After which, seal the 4 corners of the paper with the wax from the candle. That evening burn it.