Average in Phuket is about 12,000 baht per year depending on the size of the property obviously,
You can buy the stuff yourself if you have the time,
Also you can buy from Homepro them ultra sound gadgets that you plug in, they worked for me,
I don't know what you bought but there is no way you could take 3 drops of the stuff we got, one night I made the mistake of putting 2 drops on my tongue, I didn't do that again, I did wake up to go to the toilet feeling my way around the bedroom to get there,
In Phuket were I live the Thai's have to much money if you go to 7/11 early in the morning and see the kids on the way to school buying all sorts of junk already obese