@Daniel *********
I can tell you there is zero risk of fine even you do nothing, just travel minimum every 6 month.
And if you want to have tm30 you can register online with the information what should be attached to the rental contract or you go to immigration office with passport and tell them you are back same address again. Nothing to fill out.
My landlord died 3 years ago and I made a new contract with his son but still register friends when they coming to Thailand online under the old name.
All the people with dtv visa are new in Thailand and don't have a clue and complain about everything. In Thailand you do not act by logic you adapt and solve problems by finding a way what suits you.