It would be interesting to know, whether she just relayed this information on to you, or whether she sought to negotiate or reduce things on your behalf. It may also depend on how rich they think you are, or you have allowed them to believe you are, or even how much someone along the road paid, plus the fact you are a farang. I would also be interested to know how it was presented to you. The way you put it, it sounded very cold and straight!
You would also need to consider how strongly you both feel about each other. If there is a will there's a way. Try suggesting, that may be possible if she is happy to wait 2 years to get married, and see if they back down!
IMHO the sin sot sounds more than twice what it ought to be. I wouldn't pay that much. The Reception costs should be borne by the family out of the sin sot. That has been the case in the several situations I came across.
One particular personal experience, involved a Thai teacher with a degree education, and the family wanted 100K, plus 2 baht of gold, though no buffaloes, - no money to come back, but they would pay for the party/reception. The daughter was upset, because they had previously told her that they would return part of the sin sot. Her older sister had married a Thai the year before and the sin sot had been 60K.
Most people I know, including my current GF say the family takes care of the party/reception out of the sin sot.
You could always say that if you pay that much you won't have any money left to take care of her, or buy her a house in due course, or better still you will have to defer the wedding 2 years, while you strive to save the required money. That should test them.
I do know of one guy who bought a buffalo.






should be "supping"a half a bitter.

