Here is a current example of what to expect reported by a foreigner who owns a durian farm.
58 trees, only 6 producing, 52 total producers spread out over 2 lots. One lot is 3 rai the other 8 rai.
Expect to harvest 9,000 kgs the first year.
The market price is currently 185 thb per kg.
That works out to roughly US $49,000 (1,678,000 thb) a year.
Sounds like a great venture until you start subtracting expenses.
Mowing, tree trimming, water, etc. eat up more than 60% of the total amount.
Profit looks to be around only 680,000 thb or US $19,500.
That is not very much profit for the amount of hard work it takes to grow this fruit.
In addition, severe flooding never before seen in his area has caused other farmers to lost all their fruit.
Not an easy go if you HAVE to make money!