The new tax rules are in place now 2024 (1st January 31st December) apparently so people who stay longer than six months must declare all foreign sourced income.
You need to see an accountant in Pattaya, they seem to be clued up on this question, as no ferang in pattaya has actually gone through the new tax arrangements for foreign sourced income.
From a condo owner, depends how much aircon you use, and condo Size of course, for instance l hardly use aircon maby accasionaly at nite in my two bedroom large condo around 1200 to 1500bahy per month.