@Jasmine *********
I use the AC this time of year for maybe 4 hours a night and not every day -lets say 3-4 times a week depending on the weather. it adds 1.5k to my PEA (government direct) bill every month. In hot season when it's on all night , the bill surges 3k+ just in AC, taking my total to 4-5k.
There are variables, of course, like the size of the AC unit, how much power it uses and the temp setting, but in all honesty, people telling you 2k is too high don't know what they're talking about.
And as other comments have mentioned, sadly, electricity is not particularly cheap in Thailand.