fair enough but retirement with multiple entry stamp over 5 years is still more expensive than DTV and no need to visit immigration ever if you travel as I do
to say you save nothing over 5 years with the annual cost of renewal and the multi entry permit is of course incorrect.
I personally travel every couple of months outside of Thailand and historically had to plan to be inside Thailand to renew. The DTV allows me to do as I wish for 5 years without ever having to visit immigration, which again is another cost in both time and expenses. So for me the DTV has many benefits over the retirement visa
the poster is out of the country for a number of months of the year. If he is out when his retirement renewal is due then he would have to start again.
Also the DTV is multi entry and retirement is not. Another 4000 Baht per year for the permit
Everyone is different but as I look at it as a retirement holder I see some flexibility with the DTV and no reason to visit immigration for 5 years