90 Days Address Reporting

Kiwi, over 60, in his second Non-O-Visa extension based on 800K in the bank for 3 months, is about to give notice to his current rental agreement and wants to travel extensively within Thailand for the next 12 months. Now, he just does not know how to proceed with regards to his address when Reporting 90 Days and any forthcoming extension.

1. Should he continue to use his actual address his extension was based on and assure by a provisional agreement with the landlord, that in the eventuality he could be reached there and inform the Immigration who issued him the extension accordingly?

2. Or should he make provisions for a permanent address where he could be reached through a close friend?

3. Or should he use the addresses of hotels or guesthouses he will be staying at the time of reporting?

Above questions are connected with the 90 Days Reporting and he therefore would like to know if apart form the 90 Days Slip what else he would have to submit while travelling.

4. Now when the extension comes up, what will have to be done then. Is a hotel or guesthouse address sufficient? What specific paper from these places would he have to submit, e.g. hoel or guesthouse bills? And again what else?

Questions and questions by this guy, but he just wants to do it right. Thanks for your answers.