@Ja***
, The cheapest and most effective way to get the most out of the validity of the visa and the time in country is to
A ) - get the METV from the thai consulate as close to the time you're comin' to thailand (so you don't burn down the 6 month validity of the visa waiting to fly here)
Then;
-enter get 60 days
-border bounce get 60 days
-border bounce get 60 days
-just before the expiration of the visa itself (the "enter before" date stamped on the visa) border bounce one more time to get 60 days
-extend that last 60 day entry by 30 more days at the immigration office for 1900baht.
It's not all that useful to extend any of the entries by 30 days because all you're doing is burning the validity of the visa. Just border bounce and then extend the last entry by 30 days