@Greg **********
It seems best to me that, if I apply for my extension, I'll temporarily have the owner of the rental complex where I'm currently renting fill out a DM30 form again. This way, I won't have to notify my bank of my change of address. Once I receive my yellow house book, I'll try to fill out the TM30 form online myself as the owner, and then I'll move in. After all the positive feedback, this seems like the best solution.