Had the same questions, emailed the embassy & was told to enter hotel address as person inviting me, I had already booked my flights so could submit also.
Will Macadam I only ever use the 60 day tourist visa now, I'm currently in Siem Reap (Evisa online for here, so easy) & will travel back next week to Thailand through Poi Pet😵 for 45 days I assume but fly back to Blighty within 30 days.
Am I correct in saying that changing from retirement visa to marriage visa you eliminate the 90 day reporting & the need for an exit/re-entry permit should you want to leave but will then no longer do the 90 day reporting instead you will need to exit the Kingdom every 90 days?