@Jakee *********
So you already are on the 30+30 days visa exempt, wish to re-enter with a 60+30 days tourist visa, and after that do another border run and visa-exempt entry? All I can say is, Immigration might refuse the 30 days extension for your second visa-exempt entry. Have a plan B just in case they will keep the 1900.- THB and stamp you with "application denied, you have 7 days to leave the kingdom"